Which equation shows a direct proportional relationship?
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Hmmm the y-intercept is at -2? what does that mean? well, is where the graph "intercepts" or touches the y-axis, and when that happens, x = 0, so the point is really ( 0 , -2 ).
and we know where the vertex is at. Let's assume a vertical parabola, in which case the squared variable is the "x".
and we know where the vertex is at. Let's assume a vertical parabola, in which case the squared variable is the "x".