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3 years ago

9

If y varies directly as x, and y is 400 when x is rand y is r when x is 4 what is the numeric constant of variation in this rela

tion?

1 answer:

s344n2d4d5 [400]3 years ago

3 0

Answer:

Step-by-step explanation:

y = kx

400 = kr . . . . . . (1)

also, r = 4k . . . .(2)

400 = k(4k) = 4k^2

k^2 = 400/4 = 100

k = sqrt(100) = 10

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