suppose y varies directly with x write a direct variation equation that relates x and y. y=-10 when x= 2
"...y varies directly with x.." ----> y = kx
when y = -10, x = 2
-10 = k(2)
k = -5
y = -5x
when y = -10, x = 2
-10 = k(2)
k = -5
y = -5x