Question

Explain how to use a graph of the function f(x) to
find f(3)

Answer 1

For f(3), the input is 3 and you are looking for the output. To determine the function's value when x = 3, go to the value of 3 on the x-axis and then locate the graph for that value of x. Determine the value of y from the y-axis at that location on the graph.

Explanation:

Sample response

Answer 2

find the y-value corresponding to x=3

Explanation:

Locate x=3 on the x-axis. Follow a vertical line from that point to the graph of the function. Read from the graph the y-value of the point of intersection of that vertical line and the function. That y-value is f(3).