Y=x-2+3
I put x-2 because when graphing it's the opposite so it would technically be x+2
Then the +3 for the y chords which go up by 3 ! if this is wrong then try Y= (x-2)+3
I'm not sure I understand what you're saying, but I think you mean to simplify the fraction form of 0.5.
You don't have to simplify as the decimal is already the simplified version of the fraction.
The fraction version of 0.5 is 1/2, as the percentage is 50%. 50% is 50/100 and if you simplified that you would get 1/2.
To figure out R, add 1.97+0.65 together. 1.97+.065=2.62