While hiking, Julia kicked a small rock off a ledge that was meters above a crevasse. Use GeoGebra to graph the situation using the formula y=−4.9t2+9 . Use the graph to determine when the rock will hit the bottom of the crevasse, 2 meters below ground level. Round your answer to the nearest tenth of a second.(1 point) The rock will hit the bottom of the crevasse in ? seconds.
To graph the situation using the formula y = -4.9t^2 + 9 in GeoGebra, follow these steps:
1. Open GeoGebra and select the Graphics view.
2. In the Input bar, type y = -4.9x^2 + 9 and press Enter.
3. The graph of the equation should appear. To see the point where the rock hits the bottom of the crevasse, click on the graph to activate the Algebra view.
4. Look for the point where the y-coordinate is -2 (2 meters below ground level). The x-coordinate at this point is the time it takes for the rock to hit the bottom of the crevasse.
In this case, the rock will hit the bottom of the crevasse in approximately 1.3 seconds.