How to Read a FUNCTION GRAPH (Find f(-2) Instantly! Easy Visual Explanation)
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How to Read a FUNCTION GRAPH (Find f(-2) Instantly! Easy Visual Explanation)
In this quick math lesson, I show exactly how to find a function output from a graph. We look at f(-2) and interpret it visually: 1) treat the x-axis as the input axis, 2) go to x = -2, 3) go up or down to the graph, 4) read the y-value as the y-coordinate of the point on the graph. In this example, the point is (-2, –1), so f(-2) = –1 ...
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