Which of these relations are functions? {(-5,-7), (-2,-7), (7,17), (-5,21)} x 2 -2 6 2 -6 y 11 -5 21 15 -15 x 4 -4 7 -7 -4 y 3 -2 11 5 -5

The perimeter of a rectangle is greater than or equal to 74 meters. if the length is 25 meters, the minimum width of the rectangle is meters.

(-y to the power of 2 - 4y- to the power of 2 -6 y +3)

The cost varies directly with the number of tickets purchased. it costs $145 for 10 people to attend a concert. a. what is the constant of proportionality (k)? b. write the direct variation equation. c. home much does it cost for 8 people? d. graph this situation. be sure to label each axis and give the graph a title.