To find f(3) using a graph of the function f(x), follow these simple steps:
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Look for the x-axis: Find the horizontal line on the graph. This line represents all the possible x values.
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Locate x equals 3: Move along the x-axis to the point where x is equal to 3. This is where you will be checking the value of the function.
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Draw a line up: From the point where x is 3, draw a vertical line straight up until it reaches the graph of the function.
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Find the point on the graph: When you reach the graph, look at the point where your vertical line intersects or touches the graph.
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Read the value: Now, follow the horizontal line from the point of intersection to the y-axis. The y value at this point is f(3).
So, f(3) is the y value that corresponds to x equals 3 on the graph.