How to add a marker line to the surface part of the green area and get rid of the black box lines on the top and right side?
I need to draw an x between 2 and 4 to a shaded area, but have hit a snag, the surface part doesn't feel like there is a good way to do it, and I need to find the x coordinates of the point where the two lines intersect. And how to get rid of the black box lines on the top and right side. names default to here(1);
new window("Ex",
gb=graph box(
framesize(300,300),
x scale(-6,6),
y scale(0,
...