The function f(x) = 4.50x + 19 relates how much Sean pays to his scout club, f(x), to the number of patches, x, he earns in a month. What is the value and meaning of f(12)?

Question

aveline · Answer

f(x)=4.50x+19
If we make "x" 12, it means that he earns 12 patches.
Substitute 12 for x in the equation. How much will he have to pay his scout club?

anonymous · Answer

f(x) represents the mapping of values of variable x from a set called the Domain to corresponding values in a set called the Range. The mapping is determined by the function 4.50x + 19. This tells you how to get from a value in the Domain to a value in the Range. Therefore f(12) means the mapping at the value 12 in Domain. f(12) =  54 + 19  = 73.