Y=3xx=3yIf you sub for y:x = 3*3x1 = 9 There's no solution possible other than x and y are zero.x = 3*3xx = 9x8x = 0x = 0y = 0<span>If you graph these, you get 2 straight lines that intersect at the origin (0,0)</span>
That's an equation that describes a linear and proportional relationship between 'x' and 'y'. The graph of that equation is a straight line through the origin whose slope is. 1/3 .
