float delta = b*b-4*a*c;
        float topx_1;
        float topx;
        float topy;
        float topy_1;

        if(b==0){
            topx = c;
            topy = a;
        }
        else if((c<0 && a<0) || (c>0 && a>0)) {
            topx_1 = 2 * a;
            topx = -(b / topx_1);
            topy = -(delta / (4 * a));
        }
        else {
            topx_1 = 2*a;
            topx = -(b/topx_1);
            topy_1 = -(delta/(4*a));
            topy = topy_1/4;
        }

        double[] pointsx = {-abs(4*topx), -abs(3*topx), -abs(2*topx), -abs(topx), abs(topx), abs(2*topx), abs(3*topx), abs(4*topx)};
        double[] pointsy = {-abs(4*topy), -abs(3*topy), -abs(2*topy), -abs(topy), abs(topy), abs(2*topy), abs(3*topy), abs(topy)};
        for(int i =0; i < pointsx.length; i++){
            pointsx[i] *=100;
            pointsx[i] = Math.round(pointsx[i]);
            pointsx[i]/=100;
        }
        for(int i =0; i < pointsy.length; i++){
            pointsy[i] *=100;
            pointsy[i] = Math.round(pointsy[i]);
            pointsy[i]/=100;
        }

        Graph graph = new Graph.Builder()
                .addFunction(x -> a * x * x + b * x + c, Color.BLUE)
                .setWorldCoordinates(-abs(topx*5), abs(topx*5), -abs(5*topy), abs(5*topy))
                .setXTicks(pointsx)
                .setYTicks(pointsy)