Which of the following represents a function?

a.
x -10 -8 -3 -3
y 16 14 16 15

b.
x -10 -8 -10 3
y 16 16 22 15

c.
x -10 -8 -3 3
y 16 14 22 16

d.
x -10 -8 -3 -8
y 16 14 16 15

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

Someone answer asap for ! the boiling point of water at an elevation of 0 feet is 212 degrees fahrenheit (°f). for every 1,000 feet of increase in elevation, the boiling point of water decreases by about 2°f. which of the following represents this relationship if b is the boiling point of water at an elevation of e thousand feet? a. e = 2b - 212 b. b = 2e - 212 c. e = -2b + 212 d. b = -2e + 212