Question 1138899

is {(-5, -1), (5, -1), (2, -1)} a function

Note: 
The function y = f(x) is a function if it passes the vertical line test. It is a one-to-one function if it passes both the vertical line test and the horizontal line test.

in your case, ordered pairs  represents a function because no matter what input you give it gives the same output 

this kind of function is usually written as {{{y=a}}}, and your is {{{y=-1}}}, and called a {{{constant}}} function