A. Click the gray Change X (or Y) Scale button again to return to the original white graph and regular operating mode.
A. If you drag the parabola slowly, the trace dots are close together and more visible. If you drag quickly, they are widely spaced and less visible. If a slow drag does not give you the result you want, try using one of the symbolic expressions. That will yield an even set of trace dots, one per “click” on the arrows.
A. Yes. Click the button labeled Step: 0.1. You can adjust the increment of change to whole numbers, tenths, or hundredths.
A. Unfortunately, if you used the hand cursor to move the plane to a point where you cannot see either the (0) X axis or the (0 )Y axis, you may not be able to relocate the center of your graph and your parabola. Try increasing the X or Y scale. That may bring the axes into the visible part of the graph.
In this position, you are in the zero function, y=0 for all x. Dilation (multiplying the function by a constant) always yields zero for this function. To change, you must vertically translate or change the coefficient of to get another function. Go to the symbolic representation and change the value there. The parabola will move off the x-axis and you will be able to drag it again.