38.1k views
13 votes
A school’s math department has money to spend on calculators. It uses the equation y = 1,000 – 80x to determine how much money is left in the account to spend on calculators, where x represents the number of calculators purchased. What is the meaning of the slope of the equation?

A. Each calculator costs $1,000.


B. The account had $1,000 before buying calculators.


C. Each calculator costs $80.


D. The account had $80 before buying calculators.

User AndreFeijo
by
8.4k points

1 Answer

8 votes

Answer:

C. Each calculator costs $80.

Explanation:

Linear equation:

Has the following format:


y = mx + b

In which m is the slope, and the meaning is how much the output changes when the input changes by 1 unit.

In this question:

Amount remaining after buying x calculators:


y = 1000 - 80x

So the slope of -80 means that each calculator costs $80, since after buying a calculator, 80 is retired from the amount.

The answer is given by option C.

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories