Write a direct variation equation that relates x and y. Assume that y varies directly as x. Then solve. If y = 36 when x = 9, find x when y = 52. a. y = –4x; –13 c. y = 4x; 10.4 b. y = 3x; 13 d. y = 4x; 13
Write a direct variation equation that relates x and y. Assume that y varies directly as x. Then solve. If y = 36 when x = 9, x = 13 when y = 52. Let y = kx; 36 = 9k; k = 36/9; k = 4; y = 4x; when y = 52; 52 = 4x; x = 52/4; x = 13
Question
Updated 3/27/2016 9:39:38 PM
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Write a direct variation equation that relates x and y. Assume that y varies directly as x. Then solve. If y = 36 when x = 9, x = 13 when y = 52.
Let y = kx;
36 = 9k;
k = 36/9;
k = 4;
y = 4x;
when y = 52;
52 = 4x;
x = 52/4;
x = 13
Confirmed by Andrew. [3/27/2016 11:35:34 PM]

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