I have 2 questions. 1) How do you find a domain and a range of functions.? 2) how do you find max/ min values

Arandom sample of 150 high school students were asked whether they have a job. the results are shown in the table. have a job do not have a job male 48 35 female 41 26 select a ord or phrase from the drop-down menus to correctly complete the statements describing the association.

Me because some of question i don’t understand

Which of the following expressions is equal to 2x^2+8