10 POINTS
The graph below shows the price, y, in dollars, of different amounts of pounds of cheese, x: A graph titled Cheese 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 72 at increments of 12. A straight line joins the ordered pairs 0, 0 and 12, 72 Which equation best represents the relationship between x and y? y = x + 6 y = 12x y = x + 12 y = 6x

Respuesta :

Since the line goes through (0, 0), it can be described by 
   y = kx

You are given the point (12, 72), so you know
  72 = 12k
  6 = k . . . . . . . divide by 12

Then the equation of the line is ...
   y = 6x

The answer to the question is y=6x