Answer:
c. y = 1.25
Step-by-step explanation:
The equation for direct variation is
y = kx,
where k is the constant of proportionality.
We can use the given values of x and y to find k for this case.
y = kx
-10 = k * 40
k = -10/40
k = -0.25
The equation for this case is
y = -0.25x
Now we let x = -5 and solve for y.
y = -0.25x
y = -0.25(-5)
y = 1.25
Answer: c. y = 1.25
