Jonathan has been on a diet since january 2013. so far, he has been losing weight at a steady rate. based on monthly weigh-ins, his weight, w, can be modeled by the function w=-3m+205 where m is the number of months after january 2013
a) how much did jonathan weigh at the start of the diet?
b) how much weight has jonathan been losing each month?
c) how many month did it take jonathan to lose 45 pounds?
show work plz

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."