In a video game, bob can score 3 points (x) or 4 points (y) by hitting targets. to win the game he must score at least 20 points. which graph shows all of the ways bob can win the game?

Well,

we know that we need to accumulate points from x and y to reach 20 points.

since x provide 3 and y provide 4 points, the formula would be :

3x + 4y = 20 

or it can be written as : 
y = (3x/4)+5

hope this helps

5/ 1/3=15 i think sorry if im wrong