CRM 4.1 Study Guide

In the equation $y = -5x + 89.7$ modeling students' grades based on hours of TV watched, what does the y-intercept $89.7$ represent?

Given the line of best fit $y = 2.65x + 10.48$ where $x$ is oil added in cups and $y$ is total volume in ounces, what does the slope $2.65$ indicate?

In the model $y = -5x + 89.7$, the slope $-5$ means that grades increase by 5 points for each additional hour of TV watched.

In the equation $y = 2.65x + 10.48$, the y-intercept $10.48$ represents the starting volume in the bottle before oil is added.

Explain what the slope represents in the equation $y = -5x + 89.7$ relating hours of TV watched and students' grades.

Describe the meaning of the y-intercept in the context of the equation $y = 2.65x + 10.48$ where $x$ is oil added and $y$ is total volume.

Using the model $y = -5x + 89.7$, how many hours of TV watching will result in a predicted grade of zero?