17.5 because when you find range, you need to subtract the smallest number to the biggest number which in this case the biggest is 20 and smallest is 2.5.
Answer:
you have to add together all the numbers you where given then divide
Step-by-step explanation:
Start on -7 since it is the y intercept(b). 4/1 is the slope. So from seven you would go up 4 right 1.
Explanation is in the file
tinyurl.com/wpazsebu