What is a possible turning point for the continuous function f(x)? (-2,0)(0,-2)(2,-1)(4,0)

Let me start from here.The four points given are (-2,0),(0,-2),(2,-1),(4,0).When you will plot these points on the coordinate axes and join all these points you will get the shape of a triangle.One line lies completely on x axis another two lies below   x axis.These two  lines intersect at  (0,-2). Now this is the turning point of the curve because curve takes a turn from here.

The meaning of continuity is that there should be no breaking points in the function.But the function breaks at (-2,0),(0,-2)&(4,0).So at all these points function i.e triangular curve takes the turn.So this might be also the turning point.

add 5 subtract 1

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the least value out of the data shown is 5, maybe if you post a picture with it i could a little more.

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