Icant figure out any of these problems! i would love some !

Mary beth used the mapping rule to find the coordinates of a point that had been rotated 90° counterclockwise around the origin. examine the steps to determine whether she made an error. m (3, –6) is rotated 90° counterclockwise. (x, y) → (–y, x) 1. switch the x- and y-coordinates: (6, –3) 2. multiply the new x-coordinate by –1: (6(–1), –3) 3. simplify: (–6, –3) .

Which of the functions graphed below has a removable discontinuity?

If a company produces x units of an item at a cost of $35 apiece the function c=35x is a of the total production costs