The statement that is not true is: B. The graph of a linear function is a vertical line.
The equation that defines a linear function is, y = mx + b, where b is the y-intercept and m is the slope of the line, which is constant.
Also, a linear function is a straight line graph and are mostly slanted, so, it's not vertical.
(0, 0) can be a point on a linear function graph as well. Thus, the the statement that is never true about a linear function graph is: B. The graph of a linear function is a vertical line.
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