Question

How can you determine whether a relation is a function?

Answer 1

if x values repeats then relation isn't a function

Answer 2

for graph
draw a vertical line
if the graph of the equation intersect the vertical line at `two` points then relation isn't a function

Answer 3

\[\rm (\color{ReD}{2},3)(4,5)(\color{ReD}{2},4)(9,3)\]
example ^^ not a function
x values r repeated which is 2

Answer 4

(x,y) first number represent x-coordinate
2nd one is y-coordinate (we don't care abt y-coordinate it's okay if y values are repeating in the relation )

Answer 5

thanks

Answer 6

np :=)