### Determine if an equation determines a function

1. Determine whether the equation defines a function with independent variable x. If it does, find the domain. If it does not, find a value of x to which there corresponds more than one value of y. x|y| = x + 9 2. Use the graph of the function to estimate: (See attached) a. f(2) b. f(-4) c. All x such that f(x) = 0