The table below shows the number of jumping jacks completed after a given period of time in minutes.
Considering the jumping jacks: 70,140,210,280$, what is the common difference?
Now, think of this table as a set of ordered pairs. This means that the first row can be placed in an ordered pair as (1, 70). The second row can be written as (2,140). Using this, what is the slope of the line that connects the first two points?_________
What is the slope of the line that connects the 3rd and 4 th point?__________
What is the slope of the line that connects the 1 st and the 4 th point?____________
Is the common difference (aka siope aka rate of change) constant?__________
Why is it or is it not constant?__________