How can i start this one i'm lost again

Organisms that live in the alpine and taiga biomes have developed unique adaptations that aid in their survival. the douglas-fir is a conifer tree that grows in the taiga biome. it has an average height of about 70 feet, and its wood is an important source of lumber.

What is the range of the data below? .8090100

Use the function f(x) is graphed below. the graph of the function to find, f(6). -2 -1 1 2