What is the concavity of a linear function?
Here's an approach...
A linear is in the form
We can find the concavity of a function by finding its double derivative (
Let's do it then!
So this tells us that linear functions have to curve at every given point.
Knowing that the graph of linear functions is a straight line, this does not make sense, does it?
Therefore, there is no point of concavity on the graphs of linear functions.