detremine whether the relation is a function or not
1)y=-15 2)x=5
3)((1,0),(1,4),(-1,1))
4)((6,3),(5,-2),(2,3))
PLEASE EXPLAIN WITH DEETAILED
#1 yes
#2 no
#3 no
#4 yes
why? a relation from x to y is a function if no x value maps to more than one y value.
That is if
f(a) = c and f(b)= c then a=b.
Geometrically, it means that no vertical line can intersect the graph in more than one place. try graphing your relations and see how that works.