Question

For the function f(x) = 15x + 5.50, what is the value and meaning of f(5)?

A) f(5) = 80.50, meaning Claire spends $80.50 for shopping.
B) f(5) = 75.50, meaning Claire spends $75.50 for shopping.
C) f(5) = 90.50, meaning Claire spends $90.50 for shopping.
D) f(5) = 70.50, meaning Claire spends $70.50 for shopping.

Answer 1

For the function f(x) = 15x + 5.50, the value of f(5) is calculated by substituting 5 into the function, resulting in an answer of $80.50. This represents the amount Claire spends, which is answer A.

Step-by-step explanation:

To find the value of f(5) for the function f(x) = 15x + 5.50, you substitute 5 for x in the function and then perform the calculation:

f(5) = 15(5) + 5.50 = 75 + 5.50 = 80.50.

The correct value of f(5) is 80.50, meaning if this function represents the amount of money Claire spends for shopping, then Claire spends $80.50 when she shops with the quantity represented by '5'. Therefore, the answer is A) f(5) = 80.50, meaning Claire spends $80.50 for shopping.