yeah
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Yes the graph of a function can be a vertical or a horizontal line
A constant function is just a horizontal line. To graph the function y=5 or f(x)=5, just draw a horizontal line at y=5 and x=0. | | |-------------------- y=5 | | ---------------------
I posted this question myself to be honest because i wasn't sure... but the horizontal line test was made to prove whether the function/graph was an one-to-one function
yes
On a graph, a horizontal line reprents no change in data.