Is the equation $y = - 15 x$ $y = -15x$ a direct variation, if so what is the constant of variation?

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Answer 1 · 2015-04-09T01:22:58

Yes, the equation $y = - 15 x$ $y=-15x$ is a direct variation, and -15 is the constant of variation.

In order to be a direct variation, the line must go through the origin (0,0), which this equation does. Also, the slope is the constant of variation.

If $x = 0$ $x=0$

$y = - 15 \cdot 0$ $y=-15*0$

$y = 0$ $y=0$

Point= $(0, 0)$ $(0,0)$ .

graph{y=-15x [-10, 10, -5, 5]}

Is the equation y=−15xy = -15x a direct variation, if so what is the constant of variation?