### Home > CALC > Chapter 11 > Lesson 11.4.1 > Problem 11-129

11-129.

Take the derivative and use it to determine when the point changes directions.

The point changes direction when *t* = 1/3 and *t* = 1.

11-129.

Take the derivative and use it to determine when the point changes directions.

The point changes direction when *t* = 1/3 and *t* = 1.