For the graph below, determine if it represents a function that is increasing or decreasing, and whether the function is concave up or concave down.

The bar graph to the right shows the average number of hours that people sleep per​ day, by age group. Use this information to complete parts a and   Consider a​ function, f, whose domain is the set of six ages shown. Let the range be the average number of hours that people sleep per day. Write the function as a set of ordered pairs. f= Write the relation that is the inverse of f as a set of ordered pairs. The relation is Based on these ordered​ pairs, is f a​ one-to-one function?   The function f is not a​ one-to-one function because the relation that is the inverse of is a function. B. The function f is a​ one-to-one function because the relation that is the inverse of f is a function. C. The function f is not a​ one-to-one function because the relation that is the inverse of f is not a function. D. The function f is a​ one-to-one function because the relation that is the inverse of f is not a function.

Jeff delivers pizza for Papa Jim’s Pizza. Papa Jim’s pays Jeff $6.75 per hour. In addition to this hourly rate, Jeff earns $0.65 for every pizza he delivers.     Write the function that describes Jeff’s wages, where x represents the number of pizzas he delivers during a 8-hour shift.       If Jeff works a 8-hour shift and delivers 67 pizzas during his shift, how much money will he earn?

Write an equation for the function represented by the following graph: 0.667 n 1. n 1.667 n 2. n 2.667 n -2- -3 1. 2.