Melt Away Weight Loss uses the regression equation

y = 1.8x + 1.2 to predict the weight loss of their clients.

In the equation:

x = the number of weeks on a diet

and

y = the total number of pounds lost.

Using the equation, how much weight did Steve lose in 4 weeks?

In our equation, the Y value is the dependent variable and the X is the independent variable. The amount of pounds lost depends on the number weeks on a diet. To get the actual pounds Steve was able to lose in 4 weeks, we have:

Y = 1.8x + 1.2

Y = 1.8 (4) + 1.2

Y = 8.4 pounds