9, 14, 14, 19, 19 is this geometric or arithmetic or neither if neither give the next two sequence

100 points, hi, i’m not sure how to get the equation from the graph and table.

Officer brimberry wrote 32 tickets for traffic violations last week, but only 4 tickets this week. what is the percent decrease? give your answer to the nearest tenth of a percent.

Im so bad at fractions they are not my best math thing to work on