# LESSON 9-7 PROBLEM SOLVING SCATTER PLOTS

Algebra 1 Radical expressions Overview The graph of a radical function Simplify radical expressions Radical equations The Pythagorean Theorem The distance and midpoint formulas. Algebra 1 Exponents and exponential functions Overview Properties of exponents Scientific notation Exponential growth functions. Algebra 1 Formulating linear equations Overview Writing linear equations using the slope-intercept form Writing linear equations using the point-slope form and the standard form Parallel and perpendicular lines Scatter plots and linear models About Mathplanet. Algebra 1 Visualizing linear functions Overview The coordinate plane Linear equations in the coordinate plane The slope of a linear function The slope-intercept form of a linear equation. Algebra 1 Rational expressions Overview Simplify rational expression Multiply rational expressions Division of polynomials Add and subtract rational expressions Solving rational expressions. To help with the predictions you can draw a line, called a best-fit line that passes close to most of the data points. If there is, as in our first example above, no apparent relationship between x and y the paired data are said to have no correlation and x and y are said to be independent. The further away from the known x-values you are the less confidence you can have in the accuracy of the predicted y-values. If y tends to increase as x increases, x and y are said to have a positive correlation And if y tends to decrease as x increases, x and y are said to have a negative correlation If there is, as in our first example above, no apparent relationship between x and y the paired data are said to have no correlation and x and y are said to be independent. Algebra 1 Rational expressions Overview Simplify rational expression Multiply rational expressions Division of polynomials Add and subtract rational expressions Solving rational expressions. For this you have to use a computer or a graphing calculator.

Algebra 1 Visualizing linear functions Overview The coordinate plane Linear equations in the coordinate plane The slope of a linear function The slope-intercept form of a linear equation. To help with the predictions you can draw a line, called a best-fit line that passes close to most of the data points.

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## Scatter plots and linear models

When you use a line or an equation to approximate a value outside the range of known values it is called linear extrapolation. Approximately half of the data points should be below the line and half of the points above the line. Add the data in a scatter plot and determine whether there is a correlation or not between x and y. A scatter plot is used to determine whether there is a relationship or not between paired data. Algebra 1 Linear inequalitites Overview Solving linear inequalities Solving compound inequalities Solving absolute value equations and inequalities Linear inequalities in two variables. You’ve summarized your result in a table. Algebra 1 Formulating linear equations Overview Writing linear equations using the slope-intercept form Writing linear polts using the point-slope form and the standard form Parallel and perpendicular lines Scatter plots and linear models About Mathplanet. Algebra 1 Exponents and exponential functions Overview Properties of exponents Scientific notation Exponential growth functions.

Algebra 1 How to solve linear equations Overview Properties of equalities Fundamentals in solving equations in one or more steps Ratios and proportions and how to solve them Similar figures Calculating with percents.

If the data points come close to the best-fit line then the correlation is said to be strong. To find the most accurate best-fit line you have to use the process of linear regression. Algebra 1 Rational expressions Overview Simplify rational expression Multiply rational expressions Division of polynomials Add and subtract rational expressions Solving rational expressions.

# Scatter plots and linear models (Algebra 1, Formulating linear equations) – Mathplanet

For this you have to use a computer or a graphing calculator. The further away from the known x-values you are the less confidence you can have in the accuracy of the predicted y-values. If there is, as in our first example above, no apparent relationship between x and y the paired data are said to have no correlation and x and y are said to be independent. Video lesson Add the data in a scatter plot and determine whether there is a correlation or not between x and y x 1 4 5 7 9 y 14 34 27 40 Let’s say that you’ve the first of every month for one year been counting the amount of people on a subway platform each morning between 9 and 10 o’clock.

READ THE CASE STUDY 12.1 THE PROBLEMS OF MULTITASKING IN THE TEXT ON PAGES 405-406

Algebra 1 Exploring real numbers Overview Integers and rational numbers Calculating with real numbers The Distributive property Square roots. Algebra 1 Discovering expressions, equations and functions Overview Expressions and variables Operations in the right order Composing expressions Composing equations and inequalities Representing functions as rules and graphs.

Algebra 1 Systems of linear equations and inequalities Overview Graphing linear systems The substitution method for solving linear systems The elimination method for solving linear systems Systems of linear inequalities. Search Pre-Algebra All courses.

Algebra 1 Radical expressions Overview The graph of a radical function Simplify radical expressions Radical equations The Pythagorean Theorem The distance and midpoint formulas. If y tends to increase as x increases, x and y are said to have a positive correlation And if y tends to decrease as x increases, x and y are said to have a negative correlation If there is, as in our first example above, no apparent relationship between x and y the paired data are said to have no correlation and x and y are said to be independent.

From a scatter plot you can make predictions as to what will happen next.