The relation f is defined by f(x)={x²,0<=x<=3,3x<=x<=10

Question

The relation g is defined by g(x)={x²,0<=x<=2,3x,2<=x<=10
Show that f is a function and g is not a function.
Plz help me sooon

Answer 1

when x = 2
g(2) = 4 and g(2) = 6 , two different values of g for one value of x. That is a no no.

however f(3) is just fine, 9 for both coming from below and coming from above