Math Problem Statement

A linear function P(t) used to model the price, in dollars, of used cars as a function of their age in years. It is known that P(1) = 7300 and P(7) = 5300. Based on this model, which of the following is true?

Solution

From the image you provided, the problem seems to involve a linear function, P(t)P(t), that models the price of a used car based on its age, tt, in years. Specifically, it is known that:

P(1)=7300andP(7)=5300.P(1) = 7300 \quad \text{and} \quad P(7) = 5300.

You are asked to determine which statement best describes how the price decreases per year.

Solution:

Since this is a linear function, the price decreases by the same amount each year, which means the slope mm of the function P(t)P(t) is constant.

To find the slope mm, we can use the slope formula for a linear function:

m=P(7)P(1)71=5300730071=20006=333.33m = \frac{P(7) - P(1)}{7 - 1} = \frac{5300 - 7300}{7 - 1} = \frac{-2000}{6} = -333.33

This means the price of the car decreases by approximately $333.33 per year.

The correct answer in the image corresponds to the statement: "For each year that a car ages, its price decreases by approximately $333."

Would you like further details on how linear models work or have any questions?

Related Questions:

  1. How would the linear model change if the car's price increases with age?
  2. How do you interpret the slope in other real-life contexts?
  3. Can a linear function ever model a car's value increasing over time?
  4. What happens to the function P(t)P(t) if we model a faster depreciation rate?
  5. How would this problem change if you had a different type of function, like quadratic depreciation?

Tip:

Linear functions are a great way to model constant rates of change, but always check if your situation involves constant or changing rates!

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Math Problem Analysis

Mathematical Concepts

Linear Functions
Rate of Change
Slope

Formulas

Slope formula: m = (P(t2) - P(t1)) / (t2 - t1)

Theorems

Linear Relationship

Suitable Grade Level

Grades 9-12