Mike is saving money earned from a job. for every $20 mike earns, he puts $4 into savings. mike is going to graph his savings. the x-axis will be the amount earned, and the y-axis will be the money saved. what will be the slope of mike's graphed line? a) 5 b) 1 5 c) 5 1 d) -5 1

The first thing we must do for this case is to define the variables:
 x = the amount earned
 y = the money saved
 The equation of the line that adapts to this problem is given by:
 y = (1/5) x
 Let's check:
 For x = 20 $ we have:
 y = (1/5) (20)
 y = 4 $
 
 The slope of Mike's graphed line will be:
 B) 1/5