### Concept (1)

Sometimes when graphing a shape or equation we want to add a parameter, something like time, which requires us to use parametric equations. One example of the use of parametric equations is to describe the motion along a line. Parametric equations can also be used to describe line segments or circles. Parametric equations are represented by two functions of x and y dependent on t.

### Sample Problems (3)

Need help with "Parametric Equations and Motion" problems? Watch expert teachers solve similar problems to develop your skills.

###### Problem 1
How to determine the path of an object by eliminating the parameter when the position is given by parametric equations.
###### Problem 2
How to determine the path of an object by eliminating the parameter when the position is given by parametric equations with trigonometric equations.
###### Problem 3
How to find the horizontal distance a projectile travels and how to graph on the TI-84 the parametric equations describing its motion.