Y=a(x-r)(x-s) what is a and r and s ?

The constant a is the scale factor on the parabola; positive a makes a CUP (concave up), which is the usual orientation.  Negative a makes an upside-down parabola.  Big a (in absolute value) makes a skinny parabola, small a a wider one.

r and s are the zeros of the quadratic function, the values of x that give y=0.

a , r, s , x all are variables

there is no grid

step-by-step explanation: