Question

Find the value of f(4) for the function

f(a) = 5(a + 2) - 1

A.
4


B.
6


C.
21


D.
29


Function f is a linear function and function g is defined by g(x) = f(x) + k. If the value of k is 7, how does the graph of g compare with the graph of f?

The graph of g is the graph of f
Choose...

Answer 1

f(4) = 5(4 + 2) - 1 = 5(6) - 1 = 30 - 1 = 29 → D.

Since g(x) = f(x) + 7, the graph of g is the graph of f shifted up 7 units (every y-value increased by 7).