Actually Welcome to the Concept of the Graphs and plots,
since the given equation is a parabolic equation graph, hence we substitute every value to get the value of variable y.
1.) if x = -5 ,then 25-30-7 => y = -12
2.) if x = -1 , then 1-6-7 => y = -12
3.) if x = -6 , then 36 -36 -7=> y = -7
4.) if x = 0 , then 0+0-7 => y = -7
hence all values are proved above
To be able to compare the rates, we will write them in fraction form.
The fraction that represents Joe's rate is:
and the fraction that represents Bob's rate is:
Simplifying the above fractions, we get:
Since:
then Bob and Joe did not work at the same rate.
Answer:
No, Bob and Joe did not work at the same rate.