Does this set of ordered pairs represent a function? why or why not?

{(-1,5), (0, -3), (2,,0), (7,5)}

a. no, because one x-value corresponds to two different y-values.

b. yes, because there are two x-values that are the same.

c. no, because two of the y-values are the same.

d. yes, because every x-value corresponds to exactly one y-value.

The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.

Which description is represented by a discrete graph? kiley bought a platter for $19 and several matching bowls that were $8 each. what is the total cost before tax? the temperature at 9 a.m. was 83° f and is heating up at an average rate of 6°f per hour. what is the temperature x hours later? juan ate an egg with 78 calories and some cereal with 110 calories per serving for breakfast. what is the total amount of calories he consumed? a bottle contained 2,000 ml of liquid and is being poured out at an average rate of 300 ml per second. how much liquid is left in the bottle after x seconds?

The area of a circle is equal to 1 dm². find the radius of the circle.