Find a number you can multiply by the bottom of the fraction to make it 10, or 100, or 1000, or any 1 followed by 0s.
Multiply both top and bottom by that number.
Then write down just the top number, putting the decimal point in the correct spot (one space from the right hand side for every zero in the bottom number)
The first interception for this function would be at (1,0) the next would be (4,0)
I would pick the third choice because in order to find x, you must multipy your 4.
5 you add them all up and then divide by how many number you added
(6+3+2+1+9+9) and then divide by 6