35/6 + 1 3/4 = ? say the formula as well

The box plot shows the number of raisins found in sample boxes from brand c and from brand d. each box weighs the same. what could you infer by comparing the range of the data for each brand? a) a box of raisins from either brand has about 28 raisins. b) the number of raisins in boxes from brand c varies more than boxes from brand d. c) the number of raisins in boxes from brand d varies more than boxes from brand c. d) the number of raisins in boxes from either brand varies about the same.

What is a graph with a never ending line called?

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?