Find where the graph is concave up and concave down.

3X^4 - 16X^3 + 24x^2 + 1

I determined that there were points of inflection at x=2/3 and x=2. At x=2/3 the graph is concave up. At x=2 , the graph is concave down.

If I wanted to state where the graph is concave up or concave down, would it be correct to say that the graph is concave up on the interval (2/3, 2) and concave down on the interval (2, 00]