1. which relation represents a function?

a] x = 1, 1, 1, 1, 1
y = 2, 3, 4, 5, 6

b] x = 1, 2, 3, 4, 5
y = 5, 4, 3, 2, 1

c] x = 1, 2, 1, 2, 1
y = 0, 1, 2, 3, 4

d] x = -2, -1, 0, -1, -2
y = 2, 3, 4, 5, 6

2. the function f(x) varies directly with x and f(x) = 2 where x= 10

what is the value of f(x) if x= 40

a] 320
b] 45
c] 200
d] 8

Each of the walls of a room with square dimensions has been built with two pieces of sheetrock, a smaller one and a larger one. the length of all the smaller ones is the same and is stored in the variable small. similarly, the length of all the larger ones is the same and is stored in the variable large. write a single expression whose value is the total area of this room. do not use any method invocations.

Which expression will have the same sum as 3_8 + 1/4?

What describes horizontal cross section of the right rectangle 6m 8m 5m