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.
value of K is -2
The direct variation equation that relates x and y is written as y = kx, where k is the constant of variation.
Given that k = -2, the equation becomes y = -2x.
To find the value of y when x = 7, substitute x = 7 into the equation:
y = -2(7)
y = -14
Therefore, when x = 7, y = -14.