Please help me will mark brainliest

i always help evryone but noone helps me:(

I haven't learn this yet but you can maybe ask desmos that app is helpful maybe it can help with your question.

in cartography, a contour line (often just called a "contour") joins points of equal elevation (height) above a given level, such as mean sea level. a contour map is a map illustrated with contour lines, for example a topographic map, which thus shows valleys and hills, and the steepness or gentleness of slopes.

explanation: