Your friend needs to gain weight to wrestle in a heavier weight class. His goal is to gain 2 pounds per week. After 3 weeks, his weight is up to 158 pounds. If the rate of weight gain stays the same, which equation shows his weight at the end of each week?
If the rate of increase is 2 pounds/week, then the weight gained after 3 weeks would be 6 pounds therefore his initial weight would be 152 pounds. So the linear equation would be 152+2w, w being the amount of weeks
