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17 September, 06:35

A.

Suppose that y varies with x, and y = 15 when x = 6. Write an equation

B.

Find y when x = 7

whats y?

+3
Answers (2)
  1. 17 September, 07:27
    0
    y is 15
  2. 17 September, 09:20
    0
    y = 5/2x

    y = 35/2

    Step-by-step explanation:

    direct variation

    y = kx

    Substitute the values for x and y

    15 = k (6)

    Divide each side by 6 yo find k

    15/6 = k

    5/2 = k

    The equation is y = 5/2 x

    Now we know x = 7

    y = 5/2 (7)

    y = 35/2
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