Is the relation a function? why or why not?
{(-5, 7), (-2, -1), (0, 3), (4,7)}

yes; two domain values exist for range value 7.

yes; only one range value exists for each domain value.

no; the relation passes the vertical line test,

no; two domain values exist for range value 7.

Which system of linear inequalities is graphed? can somebody pleasssse

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) .

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers