If y varies directly as x, and y = 36 as x = 9, find y for the x-value 5

1 answer:

6 0

Y varies directly as x means this equation : y=kx

given y=36 and x=9, plug it into the equation to find k
36 = 9k, so k=?
k=4

so now you have your equation y=4x
and you're trying to find y given x=5
so
y= 4(5) so y=?

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