All you have to do is:
Make all of your fractions to common denominator.
Then, you add 8 3/10-1 2/5- 2 1/3+ 4 3/5
And when you solve it, you get 9 5/30 and when you simplify it,
You get 9 1/6 yards of ribbon
First graph is the correct one.
when x= 1
y=f(x) = -√1 = -1
when x= 2
y= -√2