Question

Help, picture attached. Show working thanks.

Answer 1

a) is not a function because it has 2 values of y for the same x;

Answer 2

but u can just use the vertical line test and cut it through once and that means it's a function?

Answer 3

u don't need 2 state the domain and range for the questions, that i can figure it out for most of them.

Answer 4

b) is a function for the same reason (a) isn't. the domain is D={-3,-1,0,1,2} and the range is {-2,-1,1,3}

Answer 5

so as long as there are two values of y for the same x then it's not a function?

Answer 6

yep. a binary relation f(x) is a function if and only if, for each x, there is only one f(x) associated.

Answer 7

why b is not a function?

Answer 8

i think it's a function

Answer 9

b is a function indeed, read again :P

Answer 10

ok lol

Answer 11

i) is not a function

Answer 12

L is not a function x<0 has no image

Answer 13

sorry, i have to go but i will be bak in about half an hour.

Answer 14

(h) is not a function, it has infinite values of y for each x

Answer 15

f not too

Answer 16

can you continue ?