Question

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?

Answer 1

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

Answer 2

The total points Bob earns from is the sum of x number of 3 points and y numbers of 4 points. This sum should be AT  LEAST 20 for Bob to win the game. The inequality that best show the given condition is,
                                    3x + 4y ≥ 20