Question

Suppose y varies directly with x and y =14 when x = -4 what is the value of y when x = -6

Answer 1

y varies directlyas x means
x/y=k where k is constant
14/-4=k
-7/2=k

when x=-6
y/-6=-7/2
times both sides by -6
y=42/2
y=21
the value of y is 21