Select Is a Function or Is not a Function to correctly classify each relation. {(2, 2),(4, 4),(6, 6),(8, 8)} is this function or not function
{(0, 3),(3, 5),(5, 6),(8, 4)} is this function or not function
{(1, 2),(3, 3),(4, 8),(6, 3)} is this function or not function
{(3, 4),(5, 2),(5, 6),(7, 3)} is this function or not function
Please help me I will give you the brain thing and extra points.

Tom is the deli manager at a grocery store. he needs to schedule employee to staff the deli department for no more that 260 person-hours per week. tom has one part-time employee who works 20 person-hours per week. each full-time employee works 40 person-hours per week. write and inequality to determine n, the number of full-time employees tom may schedule, so that his employees work on more than 260 person-hours per week. graph the solution set to this inequality.

With alll of except for the 2 that i did already

Given: circle o, cd is diameter, chord ab || cd. arc ab = 74°, find arc ca.