suppose y varies directly with x wright a direct variation equation that relates x and y .then find the value of y when x=7.
y=8 when x= -4
equation:
Since y varies directly with x, we can write the equation as
y = kx
To find the value of k, we can substitute the given values into the equation. We have y = 8 when x = -4, so we can write:
8 = k(-4)
Solving for k, we get:
k = -2
Now we can substitute the value of k into the equation to find the value of y when x = 7:
y = -2(7)
y = -14