5.2 (Part 2) – Applications of y = mx+b 1. A biologist measured the diameter of a certain tree for 10 years and came up with the formula: D= 2t + 80 to find the diameter of the tree, D, measured in cm over the time, t, years. a) State the slope in units. _____________ b) What does the slope represent? ____________________ c) What is the diameter of the tree when the biologist starts to keep track of the measurements? _______________. d) State the y-intercepts with units. _____________________________. e) What does the y-intercept represent in this application? ____________________________. f) Sketch a graph of this equation. Label each axis. g) Use the equation to determine the diameter of the tree after 8 years. h) Use the equation to determine wh3en the tree will have a diameter of 92 cm.