Is each relation a function or not?

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

A sixth-grade student bought three can of tennis balls for $4 each. Sales tax for all three can was $.95. Write an expression to show the total amount the student paid.

The situation that is best modeled by a discrete graph is the daily records of the distance of each hotel from home during a cross-country trip. the height of a wave over time. the speed of a motorcycle over the distance it travels.

96.55% as a decimal

Graph the solution to y< = 1/5x+2

Need answer now! One elephant weighs 2.59 tons, and another weighs 2.63 tons. Which weight is greater? a. 2.59 tons b. 2.63 tons

What is the quotient when root 1500 is divided by 2 root 15

1 eighth the sum of 23 and 17

What is the median of the following data set? {6, 3, 9, 1, 7}

The function f (x) = 18000 (0.52) x represents the value in dollars of a vehicle x years after it has been purchased new. What is the average rate of change in value per year between years 4 and 8? -$18000/year -$1219.87/year -$304.97/year -$0.

4x-6y=2 3x+5y=11 Jonas used the linear combination method to solve the equation shown. He multiplied the first equation by 3, and the second equation by another number to eliminate the x terms. What number did Jonas multiply the second equation by?