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Home > PC > Chapter 7 > Lesson 7.1.1 > Problem 7-11


Brittany and Kylie were trying to decide where the graph of was concave up and where it was concave down. They both agreed that it was concave up for , but Kylie said that it could not be concave up for since the function was decreasing. Brittany said that it did not matter; all that mattered was that it curved up. Which of the two was right? Explain your answer.

Brittany; segments connecting any two points on the graph are above the graph.

2 curves, left curve coming from left just above x axis, rising rapidly to infinity left of y axis, right curve coming from infinity right of y axis, decreasing & going right just above x axis.