Question

The graph of a function f is given. Use the graph to answer the question.Use the graph of f given below to find f(40).

Answer 1

f(40) = 20

f(40) means the value of f(x) when x = 40. The step increment in the graph is 10, so we look at the forth mark in the right of the x axis. The y value of this point is 20, because coincides with the second mark in the vertical axis.

Then, f(40) = 20