y varies directly with x. if x is 64 when y is 160, find y when x is 68

Question

i need help with it because i do not understand it.

Answer 1

Y varies directly with x Means y=kx where k is a constant, we were told that when x=64 y=160 so k must be such that 160=64k or k=160/64 = 2.5

Sp now our equation is y=2.5x. When x=68 y= 2.5*68=170

Hope this helps

Jim