For this case we have the following function:
What we should do is evaluate the function for the different values of the independent variable.
We have then:
For x = 8:
For x = 1.8:
For x = x + 8:
Answer:
The results of evaluating the function are:

Point-slope:
y-y1= m(x-x1)
Plug in what you know.
y1= 1 and x1= -8
y-1= 2/5(x-(-8)
y-1= 2/5(x+8)
Distribute.
y-1=.4x+ 3.2 <- that is the final answer
I hope this helps!
~kaikers
Answer: the answer is 176 miles apart
Step-by-step explanation: Since they are both driving for 2 hours the speed they are going is doubled and then added together to get 176
A=lxw so 640in that is your answer