Question 1131890
I'll give you the recommendation of when you would use Quick Copies and Copy King:
First we can write two linear equations to define these stores.
Let y = Total Cost
Let x = Amount of copies
Quick Copies: {{{y=0.5x+3}}}
Copy King: {{{y=0.8x}}}
To find the point of intersection (Where both stores are the same price) we can do some algebra:
{{{0.8x = 0.5x + 3}}}
{{{0.3x = 3}}}
{{{x = 10}}}
Therefore the x value of the POI (Point of intersection) is 10.  We can now solve for the y value:
{{{y=0.8 * 10}}}
{{{y=8}}}
Therefore the POI is (10, 8) meaning at 10 copies it would cost $8 at both stores.
We can do some simple math to find out how much it would cost to be above or below 10 copies.
At 9 copies Quick Copies is $7.5 and Copy King is $7.2
At 11 copies Quick Copies is $8.5 and Copy King is $8.8
Therefore: At under 10 copies, Copy King is the better choice and over 10 copies Quick Copies is the better choice.

1. Trying to figure out which copier place is better for x amount of copies.
2. You can write this
3. You can write this
4. Look above.
5. Therefore statement above.
6. ?