:WRITING A FUNCTION RULE, THAT'S ALL!: :)
The sales tax in one state is 7%. Write a function rule for finding the total cost of an item with selling price x. Then find the total cost of a CD player with a selling price of $150.

a. f(x) = x – 7; $148.93
b. f(x ) = 0.07x; $10.50
c. f(x ) = 7 + x; $151.07
d. f(x ) = 1.07x; $160.50

Question

:WRITING A FUNCTION RULE, THAT'S ALL!: :)
The sales tax in one state is 7%. Write a function rule for finding the total cost of an item with selling price x. Then find the total cost of a CD player with a selling price of $150.

a. f(x) = x – 7; $148.93
b. f(x ) = 0.07x; $10.50
c. f(x ) = 7 + x; $151.07
d. f(x ) = 1.07x; $160.50

anonymous · Answer

Yeah, I thought that too!, but it's tax on a item that's like $150, shouldn't the price go up and not way down, so I was thinking d. what do you think? @Luis_Rivera