Back to Use the equation of a linear model to solve problems in the context of bivariate measurement data — Problem 2 · Task Set 84

Linear Models -- Tutor Intake Assessment

This is a quick check on using the equation of a fitted line: writing it,
interpreting slope and y-intercept in context, and making predictions.
The goal is to see where to focus our first sessions together, not to
grade you. Work independently, without notes.

Grade 8·8 problems·~12 min·Common Core Math - Grade 8·container·8-sp-a-3

Work through problems with immediate feedback

Concepts

A linear model relating car age (years) to resale price
(dollars) is y = -1800x + 28000. Which sentence correctly
interprets the slope in context?

For each additional year of age, the predicted resale price is associated with a decrease of $1,800

The car is worth $1,800

For each additional year of age, the predicted resale price is associated with an increase of $1,800

A car that is 1,800 years old would be worth $0