Equations don't really have x intercepts, functions or curves do. They're also known as the zeros of the function. When we set a function equal to zero we get an equation to solve, and the zeros of the function become the solutions or roots of the equation.
If a quadratic equation only has one root, that's a repeated root corresponding to a discriminant of zero.
In this example our equation is something like , or expanded
You have to multiply the original price by 1/3 and then multiplying it by 2: y=1/3x(2) y=1/3(28.5)(2) y=9.50(2) y=19 $19.5 This is 2/3 of the original price (1/3 off). Hope I helped...