Suppose y varies directly with x. If y = 6 when x = -2, find x when y = 15.
2 answers:
Answer:
C. -5
Step-by-step explanation:
Since, y varies directly with x,
⇒ y ∝ x
⇒ y = kx -----(1)
Where k is the constant of proportionality,
Given,
y = 6 when x = - 2,
From equation (1),


Again from equation (1),
y = - 3x
If y = 15,


Hence, option C is correct.
D because u going to take y6 and y 15 multiples the number it equal to y90 and take x-2 divide into 90
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