Answer:
30.31%
Step-by-step explanation:
Mark up on selling price is given by markup*100%/selling price
In this case, markup is given as $870 while the selling price is $2870 hence the percentage of narkup to selling price will be given by 
Therefore, the percentage of markup to selling price is approximately 30.31%
I think the slope is 5 and 7
So like start at one of the points and then see the number under it (x axis) and then the one on theft to it (y axis) your welcome.
Answer:
The answer is B. -10 and E. 1
$4.5 per service x 8 = $36.00
$18.00 x 8 = $144 x 20% = $29.00
$65.00