nenacayetano nenacayetano
  • 20-07-2017
  • Mathematics
contestada

If y varies directly as x, and y = 15 as x = -3, find y for the x-value of 4.

Respuesta :

choixongdong
choixongdong choixongdong
  • 20-07-2017
y = kx
15 = -3k
k = -5

so if x = 4
y = kx
y = (-5) (4) = - 20

answer

y = -20 when the x = 4.


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