Question

In order to play at the Mt. Guinea Town Miniature Golf Club, a player has to pay the membership fee and pay for each round played. The total cost is represented by the function

T = 38.79r + 17.18, where T = the total cost (in dollars) and r = the number of rounds played.

Which of the following statements must be true?

A The slope is the cost per round $38.79, and the y-intercept is the membership fee of $17.18.
B The total cost is $55.97.
C The slope is the cost per round $17.18, and the y-intercept is the membership fee of $38.79.
D The slope is the membership fee of $17.18, and the y-intercept is the number of rounds played.

Answer 1

consider y = mx + b where m is the slope and b is the y-intercept

compare this to T = 38.79r + 17.18, to see which number is the slope and which number is the y-intercept

Answer 2

notice how m, the slope, is being multiplied to the independent variable x

comparing this to T = 38.79r + 17.18, which number is being multiplied to the independent variable r?