I would have used graph b. Because it shows the decrease more than graph a.
You want to by two apples. Each apple costs three dollars. How much do you need to by two apples.
1st and 2nd pictures are for finding area and 3rd picture is for finding perimeter
hope you understood well and if not and you can ask again
As both 4/2 and 5/2 are rational Numbers and Sum of rationals is a Rational Number.
Therefore, 9/2 is a Rational Number.