Is each relation a function or not?

{ (4,-5), (0,-9), (1,0), (7,0) }

A bag contains 6 red marbles, 3 blue, and 1 yellow marble. What is the probability of drawing a red marble and then a blue marble if the first marble is not placed back into the bag before drawing the second marble?

What is the product of (3x^-4) (2y^-4) ?

How do I solve m - 4 = 2m

Factor 2k^2+25k+72 completely

A line passing through which of the following pairs of coordinates represents a proportional relationship? (2.5, 5) and (3, 5.5) (1.25, 2.25) and (2.5, 5) (1.3, 3.3) and (2.3, 4.3) (1.25, 2.5) and (3.75, 7.5)

B. Henry lives 95 km from work. How many kilometres does he drive to and from work each week? c. Henry uses 9 litres of fuel for each trip. (18 litres per day) How many litres of fuel does he use each week? d.

How many milligrams is required for a patient weighing 204 pounds

A high school has a total of 850 students. there are 60 more females students than male students. a. write a system of linear equations that represents this situation. b. how many students are female? male?

There are 6 chocolate, 4 strawberry. and 5 vanilla ice. what is the probability that an ice cream chosen at random is a chocolate flavor

The height h (in feet) above the water of a cliff diver is modeled by h=-16t2+8t+80, where t is the time (in seconds). How long is the diver in the air?