If y varies directly with x and y equals 35 when x equals 5 find x when y equals -7

y varies directly with x means y = kx, where k is the constant value. To find x when y = -7 first we have to find k, using y = 35 and x = 5

y = kx

35 = k(5)

35/5 = k

k = 7

Find x when y = -7. Remember k is constant and it stays 7.

y = 7x

-7 = 7x

-7/7 = x

x = -1

x = -1 when y = -7

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3

step-by-step explanation:

divide 13.5 by 9 to get the scale factor. it equals 1.5

2 * 1.5 = 3