Natural, Whole, and Integers. Hopefully I helped :)
There are 36in in 1 yard.
121 is the answer. you divide 22 by two and then raise it to the power of two
There are 10 possible digits and 26 possible letters.
To find the answer to this problem we have to multiply 9 as many digits has the hotel reservation number and 26 as many letters it has.
It means:

There are 1,119,214,746 possible reservation numbers.
I can tell you that the y-intercept would be at (0,-7). The x-intercept is at (-14,0). I need more details.