The ozone layer is a layer in Earth's atmosphere that absorbs most of the Sun's UV radiation
IN TEMPERATURE DECIDUOUS FOREST WE CAN FIND THEM.
You can find the elevations by finding the contour interval and each line up count up
You would draw a table like the above ^
And you would input each x value (1,2,3,0,-1,-2,-3) into the equation one by one for the value of both x and y
I did the first one for you so you understand how to do it.