So right now it is telling you that out of 60 books, 24 are nonfiction. Therefore that is 24/60. 40% of 60 is 24 so that means the other 60% is nonfiction. Hope this isn't confusing and it helps.
I dont really feel like graphing it out but i can explain it. so lets say that you had some graph points and when you drew them together it was the shape of a circle so make a line down that circle and the rule is if that circle passes through that line you drew more than 2 times it is not a function, and if it only passes through that line once then it is a function.
The answer for this is less than 887
Rearrange the equation so "y" is on the left and everything else on the right.
Plot the "y=" line (make it a solid line for y≤ or y≥, and a dashed line for y< or y>)
Shade above the line for a "greater than" (y> or y≥) or below the line for a "less than" (y< or y≤).
The domain values uniquely map to the dependent variable.
A function that fits these values is f(x)=20x+1020.
