Question

Is the relation a function?

{(14, 15), (5, 7), (3, 10), (11, 1), (5, 8)}

Answer 1

see if any x value is repeated.
if x value is repeated, then its NOT a function

Answer 2

x comes before y right?

Answer 3

yup !

Answer 4

So since there are two 5s then it wont be a function? right?

Answer 5

Perfect !!
since 5 gives u two y values, 7 and 8, its not a function. its just a relation

Answer 6

Ah, I get now. Makes sense too. Thank you for helping :)

Answer 7

for every input, a function gives u exactly 1 output value.
observe that here, if we put 5, we can get 2 output values - ambiguous.

so not fit for a function.

Answer 8

np :)