That one particular store the sale price s is always 75% of it displayed price do you write in equation that shows how to calculate s and d find the sale price if displayed price is $85

Draw a graph y=f(x) that matches the following characteristics. increasing on: -8< x< -4 and-1< x< 5. decreasing on : -4< x< -1. f(-8)=-5 and zeros at x=-6,-2,and 3. absolute maximum of 7 and absolute minimum of -5.