Question

Use the graph to find the bear’s average heart rate when it’s active and when it hibernating

Answer 1

we know that

the rate of a linear equation  is equal to the slope

Step 1

Find the  bear’s average heart rate when it’s active

Let

A(1.5,90)   B ( 2,120)

the slope is equal to

m=(y2-y1)/(x2-x1)

m=(120-90)/(2-1.5)=30/0.5

m=60 heartbeats/min

therefore

the answer part a) is

the bear’s average heart rate when it’s active is 60 heartbeats/min

Step 2

Find the  bear’s average heart rate when it’s hibernating

Let

A(1.5,18)   B ( 2,24)

the slope is equal to

m=(y2-y1)/(x2-x1)

m=(24-18)/(2-1.5)=6/0.5

m=12 heartbeats/min

therefore

the answer part b) is

the bear’s average heart rate when it’s hibernating is 12 heartbeats/min