If y(x) = 1/3x, y(-18) = 1/[3(-18)] = -1/54.
y varies directly as x y=kx, where k is a constant y=18 when x=3 18=3k k=6 y=6x
57
(3,21)
x2 / y = (6)2 /2 = 36/2 = 18
If y(x) = 1/3x, y(-18) = 1/[3(-18)] = -1/54.
3
y varies directly as x y=kx, where k is a constant y=18 when x=3 18=3k k=6 y=6x
y = 6 x 3.5; If you can't do that in your head, split it up: 6 x 3 = 18, 6 x .5 = 3, 18 + 3 = 21
y = -5
x=-1.5
40
57
(3,21)
x2 / y = (6)2 /2 = 36/2 = 18
if y=1/4x and x=,find y
(x, y) = (-3, -3) or (3, 3)