Question

to determine if a graph is a one-to-one function, do i use the vertical line or horizontal line test?

Answer 1

vertical line test to see if a graph is a function or relation.

Answer 2

for checking if graph is one-to-one function, we use horizontal line test

Answer 3

for the second graph the points are (-5,-5)(-4,-5) (-3,4)(1,4)
will those be a function? @Harkirat @campbell_st