The sale price of shrimp at a local grocery store is $1.15 for the first ounce and $0.95 for each additional ounce. Which function rule shows how the cost of shrimp, y, depends on the number of ounces, x?
A - y = 1.15x + 0.95
B - y = (0.95 + 1.15)x
C - y = 0.95x + 1.15
D - y = 0.95(x - 1) + 1.15
I selected C. That is incorrect. The correct answer is D. How do you get this?

Question

The sale price of shrimp at a local grocery store is $1.15 for the first ounce and $0.95 for each additional ounce.  Which function rule shows how the cost of shrimp, y, depends on the number of ounces, x?
A - y = 1.15x + 0.95
B - y = (0.95 + 1.15)x
C - y = 0.95x + 1.15
D - y = 0.95(x - 1) + 1.15
I selected C.  That is incorrect.  The correct answer is D.  How do you get this?

anonymous · Answer

Because you have to take into account that the first time you buy an ounce it has to be taken off the equation. 0.95(x-1) , the first time is 1.15 thats why you add 1.15.

dan815 · Answer

y=1.15+0.95(x-1), x>1

dan815 · Answer

this formula does not work for x=0 or less

shiree19 · Answer

oh ok.  thanks.