SOLUTION: Suppose y varies directly as x, and y=-65 when x=-26. Write a direct variation equation that relates x and y.

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Question 186619: Suppose y varies directly as x, and y=-65 when x=-26. Write a direct variation equation that relates x and y.
Answer by nerdybill(7384) About Me  (Show Source):
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Suppose y varies directly as x, and y=-65 when x=-26. Write a direct variation equation that relates x and y.
.
If "y varies directly as x" it is in the form of:
y = kx
where k is a constant
.
Using the values provided, you can find k.
y = kx
-65 = k(-26)
-65/(-26) = k
2.5 = k
.
So, our equation is:
y = 2.5x