3 years ago

The value of y varies directly with x, and y= -10 when x=40. Identify the value of y when x=-5

Mathematics

1 answer:

scoray [572]3 years ago

8 0

Answer:

y = 1.25

Step-by-step explanation:

Use the direct variation equation y = kx, and solve for k:

y = kx

-10 = k(40)

-0.25 = k

So, the equation is y = -0.25x. Solve for y when x = -5

y = -0.25x

y = -0.25(-5)

y = 1.25

So, y = 1.25 when x = -5

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