You can use the slope formula or just calculate

So for the first problem you run 3 units right and rise 5 units so

2. Notice the y axis goes by 2 units.

3.

4.

Please let me know if you have questions
R is equal to 450
first you subtract 5000 from each side
-2250=Rx5
then divid by 5
R=450
I think you add the numbers together, and then divide by three