The graph below shows the price, y, in dollars, of different amounts of granola, x, in pounds: A graph titled Granola Prices shows Number of Pounds on x axis and Price in dollars on y axis. The scale on the x axis shows numbers from 0 to 12 at increments of 2, and the scale on the y axis shows numbers from 0 to 48 at increments of 8. A straight line joins the ordered pairs 0, 0 and 12, 48 Which equation best represents the relationship between x and y? y = 8x y = x + 4 y = 4x y = x + 8