Write an equation of the direct variation that includes the point (–10, –17).
a. y= 1 7/10x
b. y= -1 7/10x
c. y= -1/17x
d. y= 10/17x
We know that when x = -10, y = -17; So, if we put those into the direct variation equation " y = kx " we get...
-17 = k (-10)
We divide by -10
-17/-10 = k
Now we put that value of "k" into the formula and we get A ( y = 1 7/10 x)
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