Answer:1. Domain: {-7,-6,-2,3,5} Range: {2,3,4,5} Function: f(x) = x/2 -replace x with the input value to find if it's a function2. Domain: {0,2,3,5,9} Range: {-3,-1,0,2,3,4,7} Function: f(x) = x/2 -replace x with the input value to find if it's a function3. Domain: {1,2,3,4,5,6,7,8} Range: {2,3,4,5,6,7,8,9} Function: f(x) = x/2 -replace x with the input value to find if it's a functionStep-by-step explanation:To find the domain, find the X values of each, for example, (2,3), the 2 is the X value. An example of a domain is {(2,3),(2,4),(3,5),(4,5)} if there are multiple of the same X values only list them once. So this example would be {2,3,4} because 2 is listed twice and you only need to list it once. One way to remember the domain comes first is X comes before Y and D, domain, comes before R, range.To find the range, find the Y values of each, for example, (2,3), the 3 is the Y value. An example of a range is {(2,3),(2,4),(3,5),(4,5)} if there are multiple of the same Y values only list them once. So this example would be {3,4,5} because 5 is listed twice and you only need to list it once. One way to remember the domain comes first is X comes before Y and D, domain, comes before R, range.To find if the numbers are a function use the formula f(x) = x/2. Function: f(x) = x/2 -replace x with the input valueI hope this answers any of the questions you may have, if you have any other questions don't hesitate to ask :)