Hassan is solving x^2+8x=6 by completing the square. His first steps are shown below.
x^2+8x+c= 6+c
(x+squared c)^2= ^=c

Ifound this on google “that means that the graph of a function with direct variation has these features: it is a straight line: because the slope is the ratio y/x = k. it passes through the origin (0,0): because y = kx = k (0) = 0.” i hope this you for what your looking for

J= r + 9 because since jessica rode 9 more miles than roger, you add 9 miles to rogers mileage.