https://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&ved=0ahUKEwjBz5OKienSAhXD4SYKHbttCx8QjRwIBw&url=http%3A%2F%2Fmathforum.org%2Fmathimages%2Findex.php%2FParabola&psig=AFQjCNG1_d1ZQkdp_zz1Opcb9LojirejgA&ust=1490236322011632
This is a real world parabola, that I have chosen. This is a stem of water from a fountain. It starts upward, curving at the peak, then straightens out and head back down. Parabola`s are a common shape. You can view this image as a cone.
This is a beautiful example. However, to find an equation for a water stream, you may want to find a side view.
Okay. Thank you, as you told me in class the height of this picture may be 10ft.