so i graphed it but it wasnt right at all i didnt find out how to place it

you basically press sine and have to place two dots on the graph i did that but i keep getting the placment wrong for both of them

For the first one the midline will occur when sin(2x) is zero; h(0) = -3 so the point is (0, -3). The maximum is when sin(2x) = 1 or when 2x = pi/2, x = pi/4. At this point h(pi/2) = 2*1 - 3 = -1, so the point is (pi/4, -1).

Try using similar reasoning for the second part.