Hamzuh M.
asked 05/09/20
If y varies directly as x and y = 7 when x = 3 find y when x = 12
Arturo O.
answered 05/09/20
Experienced Physics Teacher for Physics Tutoring
Direct variation means
y1 / x1 = y2 / x2 ⇒
y2 = (x2 / x1) y1
x1 = 3
y1 = 7
x2 = 12
Plug in the numbers and get y2.
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