Add zoom by multiples or times #10
Description
Based on the given equation or set of equations it will draw by multiplying by some decimal value. So it can zoom in or zoom out for a given function.
The zoom feature should show a number line when zoom in that only has a few digits in the x and y direction or even a fraction of a digit on the number line if zoom all the way into the graph. The zoom out will show the graph zoomed out a larger multiple of times like 5 times, 10 times where the number of digits on the x and y coordinates if shown would have an ever increasing number of digits.
There could also be the default zoom button or menu option. And use percentages instead of multiples.
The number line is an optional feature. And the zoom setting is used to better understand the equation and to plot points based on different zoom characteristics.