The number of cards left is 600-280=320.
So the 320 cards left are what percent? we count it like this:

=53.3..%
so the answer is 53.3%
I don’t know if you want both but I’m going to give you both.
(0,2) and (4,3)

3 1/4 is the right answer
Answer:
20.02%
Step-by-step explanation:
Formula : 
n = 1,2,3,4,5
Substitute the values in the formula :


Solving for IRR using calculator
IRR = 20.02
Hence the internal rate of return if the initial cost of the project is $275,000 is 20.02%
If it doesn't matter whether the points are integers or not you can just pick a number for either y or x and solve for the other variable. For example, if you pick 3 to be your x, plug it in and then solve for y. Start out with:

Plug in 3 for x:

. Then,

. Subtract 21 from both sides and then divide by -3 on both sides. You end up with y=-7 so one of your points is (3, -7)