For each function, what is the output of the given input?
a. For f(x) = 5x +1, find f(-4).
b. For f(x) = -5x +1, find f(3).
a. For f(x) = 5x + 1, when we substitute -4 for x, we get:
f(-4) = 5(-4) + 1 = -20 + 1 = -19
b. For f(x) = -5x + 1, when we substitute 3 for x, we get:
f(3) = -5(3) + 1 = -15 + 1 = -14