Question

The function f(x) is graphed on the coordinate plane. What is f(−4) ?

Answer 1

For this type of problem, plug the -4 into the graph for x. So where is the line at x = -4??
y = 4 where x = -4.
That's the same as saying: "what is the y-value when x = -4?)
f(-4) = y = 4