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function is non linear and decreasing

Step-by-step explanation:

between x=4 and x=6 the line has a negative slope, meaning that it is decreasing, and it can't be a linear function because a linear function a function whose graph is a straight line.

hope this helps!

im pretty sure it would be 5 am, hope that , and give brainliest and guys if this is right then press the button and give 5 stars