What are the different parts of the equation y = mx + b? How would you change m so that a line went up from left to right? What would happen if you change b to a number like -3? Why do we write an equation in slope-intercept form? How can you tell if a function is linear or nonlinear?

In the first challenge with three linear functions, how did you figure out which numbers would work in each equation? How did the use of exponents change the lines for those equations? What did you learn about y = mx + b during this mission? If you change m, what happens? If you change b, what happens? Identify two ways that you could distinguish the difference between linear and nonlinear functions.