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If y varies directly with x and y = 5 when x = 4, find the value of y when x = -8.

If y varies directly with x and y = 5 when x = 4, find the value of y when x = -8.
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4 votes
If y varies directly with x and y = 5 when x = 4, find the value of y when x = -8.

asked
User Mooncrater
by
7.5k points

1 Answer

5 votes

Answer:

-10

Explanation:

y= kx

or, k= y/x

or, k = 5/4

k = 1.25

y= kx = 1.25 × (-8) = -10

answered
User Claudiordgz
by
7.8k points
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