Question

Natalie recorded the number of heartbeats of cats for different time intervals, on a scatter plot. She drew a line of best fit on the scatter plot, as shown below.


Which statement best describes the meaning of the slope as a rate of change for this line of best fit?

It represents the increase in the heartbeat rate of cats.

It represents the average heartbeat rate of cats, in beats per minute.

It represents the change in heartbeat rate for unit change in time.

It represents the time in which a cat completes a heartbeat cycle.

Answer 1

Basically, the question is asking what the line represents. From the graph we can tell that as time increases, the number of heartbeats increases as well. So, the first and third answer choices are logical. However, the first answer choice does not take into account the x-axis, the time, so the third choice is more accurate.
Btw what math class is that from? I don't recall seeing any worded like that in my experience (up to Calc)

Answer 2

Algebra 1, and thank you