With the two sliders in the bottom you can change the slope of the functions.[br]You can change the distance of the blue and the red function on the x-Axis by moving the big red button.[br]In this version you can't move the car and the bicycle.

Try to find the right functions for the following problem. If you are right, a text will appear.[br][br]Martina and her little sister Kristina want to meet in Linz, which is 4 km from home. Kristina rides her bike and Martina follows by car 3 hours later.[br]When do they meet in Linz?[br][br]Why is this example unrealistic?