r =f(t) is Carla's pace(mph) t hours after 1:00pm and y = h(r) is Carla's heart rate (bpm) when she jogs at a rate of r mph

f(0.75) = 7

h(7) = 125

(h (open cirlcle) f) (0.75) = 125

dr/dt| t=0.75 = -0.00003

dy/dr|r=7 = 8

Assuming all of the previous values are accurate, what is the value of dy/dt|t=0.75 and what did this value tell you about Carla?