in the coordinate plane , points ( x , 1 ) and ( 4 , y ) are on line k . if line k passes through the origin and has slope 1 / 4 , then x + y =
"line k passes through the origin and has slope 1 / 4 means that its equation is y = 1 / 4 * x . thus : ( x , 1 ) = ( 4 , 1 ) and ( 4 , y ) = ( 4,1 ) - - > x + y = 4 + 1 = 5 . answer : d"
multiply(multiply(4, 4), divide(1, 4))