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

See below.

Step-by-step explanation:

f(3) means the y-coordinate of the point that has x-coordinate 3.

To find f(3) using a graph of f(x).

Look up x = 3 on the x axis. If the function passes through that point on the x-axis, then f(3) is 0. If the function does not pass through that point, then go up or down till you intersect the function. Draw a horizontal segment left to the y-axis and read the point on the y-axis that the horizontal segment intersects. That is what f(3) is equal to.

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step-by-step explanation:

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