Your friends 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?

Need on this one asap im almost done with this subject

What are the values of each variable in the diagram below?

Candice uses the function f(t)=t+100−−−−−−√ to model the number of students in her after-school program. the variable t represents days and f(t) represents the number of students. how many days does it take for there to be 15 students in her program? a. 225 days b. 125 days c. 325 days d. 115 days