we know that Directly proportional is a relationship between two variables that can be expressed by an equation in which one variable is equal to a constant times the other so [tex]y=kx[/tex] in this problem for [tex]x=8[/tex] [tex]y=14 \\ 14=8k [/tex] divide by 8 both sides [tex]k=14/8 \\ k=7/4[/tex]
find the value of y for [tex]x=12[/tex] [tex]y=(7/4)12 \\ y=21[/tex]
