Question

The graph of a function
y = f(x)
is shown. At which point(s) are the following true? (Select all that apply.)
ANSWER FOUND

Answer 1

(a) dy/dx is positive when the function is increasing
dy^2/dx^2 is positive when the graph is concave upward
Both are positive at point B
Answer: Point B

(b)  dy/dx is negative when the function is decreasing
dy^2/dx^2 is negative when the graph is concave downward
Both are negative at point E
Answer: Point E

(c) Answer: Point A