Every time jason buys 2 red marbles he buys 1 blue marble. if y = the number of red marbles jason buys, and x = the number of blue marbles jason buys, which graph represents this direct variation?

a)
b)
c)
d)

If y is the red marbles and x is the blue marbles, then for every x value you would be able to multiply by 2 to get the y value... it is the equivalent of looking at is as the slope rise/run or 2/1

D is the graph that shows this relationship.  Look at the x value and multiply by 2 for the y value.

Answer= Grid D
Because when the line crosses on 2 (y-axis) it only goes right (x-axis)1 time. Also when it crosses on 4 (y-axis) it goes 2 steps to the right (x-axis). I hope it helped.