NOBODY WILL HELP ME JUST TROLLS I WILL DEFINETLY GIVE BRAINLIEST JUST PLS :(

When only separate discreet points are graphed it is called?

If the cost to mail a package is an initial $5 and $0.28 for every pound the total cost to mail a package was $11.27, how much did the package weigh?

Estimate the area under the curve f(x) = 16 - x^2 from x = 0 to x = 3 by using three inscribed (under the curve) rectangles. answer to the nearest integer.