Graphs

Graphing Linear Functions-Target B: Justify whether any given representation is a function.
A graph represents a function if it passes the VERTICAL LINE TEST

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The vertical line test is checking to make sure every x value is paired with exactly one y-value. If a vertical line intersects the graph at two points, then there is an x-value that is paired with two different y - values. Look at the graph below, you will notice that the vertical line is intersecting the graph at the point (4, 3) and (4, -2). The x-value of 4 is paired with the y-value of 3 and the y-value of -2. This means this graph is not a function. =====

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Quick Check...Do the following graphs represent functions?



Quick Check Solutions - Graphs

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