Question

The function below shows the cost to attend the fair if you ride r rides.

f(r) = 5 + 1.75r
a. What is the y-intercept, and what does it mean?
b. What is the slope, and what does it mean?
c. If Al spent $19.00 at the fair, how many rides did Al ride?

Answer 1

a. y-intercept: 5

b. m = 1.75

c. 8 rides

Explanation:

The equation is y = mx + b

m = the slope

b = y-intercept

Our equation is f(r) = 5 + 1.75r

a. y-intercept is 5

b. m = 1.75

c. We put 19 in to solve

19 = 5 + 1.75r

14 = 1.75r

r = 8

So, AI ride 8 rides