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"DIRECT VARIATION Write an equation where y varies directly as x 1.) y=400 when x=25 2.) y=63 when x=81 3.) y=200 when x=300 In each of th

"DIRECT VARIATION Write an equation where y varies directly as x 1.) y=400 when x=25 2.) y=63 when x=81 3.) y=200 when x=300 In each of the FF. y varies directly as x find the values as indicated 1.) if y=-18 when x =9 find y when x=7 2) if y=-3 when x=-4 find x when y=2"

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Guest [Entry]

"Y=KX

1.
400=K(25)
K=16

2.
63=k(81)
k=7/9

3.
200=k(300)
k=2/3

y=kx

1.
(-18)=k(9)
k= -2

y=(-2)(7)
Y= -14

2.
-3 =k(-4)
k=3/4

2=(3/4)x
x=8/3"