Answer:
[tex] \large \mathbb{Y=36}[/tex]4. If y=12 when x=4, find y when x=12.
[tex] \large \mathbb{14}[/tex]5. If y=-18 when x= 9, find y when x=7.
[tex] \large \mathbb{K=-3/-4}[/tex]6. If y=-3 when x=-4, find x when y=2.
SOLUTION
4. Direct variation:
y = kx
12 = k4
k4/4 = 12/4
k = 3
If x = 12:
y = k (12)
y = 3 (12)
y = 36 ⇒ ANSWER
5.-14 is the correct answer.Because -18/9 = -2 so 7 x -2 = -14
6. y=-3 y=2
x=-4 x=
-3=k(-4)
-4=-4
k=-3/-4
