### Home > A2C > Chapter 4 > Lesson 4.2.1 > Problem 4-64

While watering her outdoor plants, Maura noticed that the water coming out of her garden hose followed a parabolic path. Thinking that she might be able to model the path of the water with an equation, she quickly took some measurements. The highest point the water reached was 8 feet, and it landed on the plants

There are several ways to write the equation. It depends on how you decide to draw the *x*- and *y*-axes.

The *y*-axis could go through the point where the water leaves the hose at *y*-axis through the vertex and place the *x*-axis so that the nozzle is at (−4, 0). Still another possibility is to make the vertex the point

Use the general equation of a parabola in graphing form:

After you've filled in the values for *h* and *k*, you will need to substitute one point (*x*, *y*) in order to solve for *a*. Then you will be able to write the equation.

Use the eTool below to check your work.

Click the link at right for the full version of the eTool: A2C 4-64 HW eTool