Help Me!

Question

Sheila wants to lose weight for an upcoming wedding. She currently weighs 186 pounds and her goal is to weigh 140 pounds. After consulting with her doctor, she feels she can safely lose 2 pounds per week. The graph tracks the projected weight loss over time. 

 

Write an equation for the weight loss trend. Use W = weight (lb) and t = time (months).

 

Use your equation to determine how long will it take Sheila to achieve her desired weight goal.

 

What is the slope (and select the correct units)?

Answer 1

W=180-2w

weight = 180 - 2xnumber of weeks

140=180-2w

2w = 180-140 =40

w=40/2 = 20 weeks

there are 52 weeks in a 12 month year

that's 52/12 weeks in a month or 26/6= 13/3= 4 1/3 weeks in a month

W=180-2(13/3)t with t in months

W=180-26t/3

140=180-26t/3

26t/3 = 40

t =3/26 x 40 = 120/26 = 60/13 = 4 8/13 months

= about 4 months & a couple weeks