Question

Hailey is taking a multiple choice test. Her grade is given by the equation y=90-2x, where y represents her final score and x represents the number of questions she got wrong. What could the number 2 represent in the equation?

A. the points she loses for every wrong question
B. the number of problems on the test
c. The score she would get if she only missed one question
d. A perfect score on the test.

Answer 1

Answer: A. the points she loses for every wrong question

She starts off with 90 points. Then she loses 2 points for each question she gets wrong.

For instance if she got x = 5 questions wrong then her score would be:

y = 90-2x

y = 90-2*5

y = 90-10

y = 80