Easy. your starting point is going to be at -2 on the y-axis. then from that point (-2) you're going to go down 1 and then over 2. then draw a straight line through those two points. The line should be a negative line.
To find the number of grams per serving, we take to total grams and divide by the number of servings. The total grams is 550 and the number of servings is 10
grams per servings = 550/10 = 55 grams per serving
