Blank is a measure of how heavy a object is

Which rational number could be graphed between -4 and -5

Okay so i didn't get this problem petro bought 8 tickets to a basketball game he paid a total of $200 write an equation to determine whether each ticket cost $26 or $28 so i didn't get this question so yeahyou have a good day.

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)