In order to evaluate the function into each one of the given values we just have to replace them for x and then calculate the output, like this:
a. g(-1)
By replacing -1 for x into g(x) = -4x + 1 we get:
g(-1) = -4(-1) + 1 = 4 + 1 = 5
b. g(-2)
g(-2) = -4(-2) + 1 =8 + 1 = 9
c. g(0)
g(0) = -4(0) + 1 = 1
Summary
g(-1) = 5
g(-2) = 9
g(0) = 1