Question

the sale price of apples at a local grocery store is $1.35 for the first pound and $1.10 for each additional pound. which function rule shows how the cost of apples, y, depends on the number of pounds, x?

Answer 1

The function that represents this situation is 

y = 1.10(x - 1) + 1.35
y = 1.10 x - 1.10 + 1.35
y = 1.10x + 0.25

y will be dependent on the value of x.

You must subtract one from the x, because the amount you pay for the first pound is already considered in the $1.35.

Answer 2

We have the following variables:
 y = the cost of apples
 x = the number of pounds
 The linear equation that models the problem is:
 y = 1.10(x-1) + 1.35
 Answer:
 A function rule that shows how the cost of apples, and, depends on the number of pounds, x is:
 y = 1.10(x-1) + 1.35