The purpose: knowing the parameters a, b, c
Exercise: Here are three windows which fit the parameters a, b, c of the square function.
first window for a
second window for b
third window for c
Choose the parameters from the example y=2x2+13x+15 and click to get the drawing.
After getting the drawing change each time the value of another parameter .
Change each parameter at least twice, once to a negative value and once to zero.
Note the variations of the graph ( The rate of the function, the position of the function
relatively to x-axis, increasing the crossing points with y-axis, maximum, minimum )
Comment: you may change the parameters as many times as you wish.
N.B.- Pay attention - one square on the x-axis is equal to one unit
one square on the y-axis is equal to ten units