Question

The function below shows the cost for Mrs. Franklin to go to a buffet with c of her

grandchildren.
f(c) = 6.85 +2.95c
a. What is the y-intercept, and what does it mean?
b. What is the slope, and what does it mean?
c. If Mrs. Franklin paid 18.65 for the buffet, how many of her grandchildren did she take
to the buffet?

Answer 1

a. y-intercept: 6.85

b. m = 2.95

c. 4 grandchildren

Explanation:

The equation is y = mx + b

m = the slope

b = y-intercept

Our equation is f(c) = 6.85 +2.95c

a. The y-intercept is 6.85

b. m = 2.95

c. We put 18.65 in to solve

18.65 = 6.85 + 2.95c

11.8 = 2.95c

c = 4 grandchildren

So, Mrs. Franklin took 4 grandchildren to the buffet.