Learning Target AK: Given an equation, I can graph an absolute value function, describe its key features, and determine its inputs and outputs, 4 points each) 14. Graph k(x) = -31x| + 1 15. Graph r(x) = = [x - 11 Use the absolute value function, f(x), to answer questions 16 - 21. (#16 4pis, #17 -21 2pts each) f (x) = -71x+21+3 16. Graph the function f (x) 17. Evaluate f (1) = 10 18. Evaluate f(-20) = 19. For what value(s) of x does f (x) = 0? 10 -9 8 -76 54 3 2-19 2 3 4 5 6 7 8 9 10 20. For what value(s) of x is f (x)