Which of the following relations describes a function?

A. (0,0),(1,1), (1,-1),(4,2)
B. (-4,2),(-1,-1),(-1,1),(0,0)
C. (0,0),(1,1),(4,2),(9,3)
D. (0,0),(1,1),(2,-2),(2,2)

Points d and e are midpoints of the sides of triangle abc. the perimeter of the triangle is 48 units. what is the value of t? ο ο ο ο 7t +

Atruck can be rented from company a $50 a day plus $0.60 per mile. company b charges $20 a day plus $0.80 per mile to rent the same truck. find the number of miles in a day at which the rental costs for company a and company b are the same

Which of the following shows the graph of y=2e^x?