Question

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)? $73.00; this is the amount Sean pays for earning 12 patches in a month $73.00; this is the amount Sean pays for 12 months of scout club $85.50; this is the amount Sean pays for earning 12 patches in a month $85.50; this is the amount Sean pays for 12 months of scout club

Answer 1

Given the function: f(x) = 4.50x + 19, f(12) basically means the value that is obtained using the function, after "x" has been substituted by the value of 12. This is illustrated below:

f(x) = 4.50x + 19

substituting x = 12:

f(12) = 4.50(12) + 19
f(12) = 73

Explaining in words, this means that Sean pays $73 to his scout club for the 12 patches that he has earned that month.