Super easy will give brainleist if done by 5: 30 pm. answer seriously or will report user. you < 3

A real world problem would be the rate of inflationary index across a month, where x is the day and y is the inflationary index by day in a given country.

If the country has a good economy, the inflationary index is almost constant or decreasing as best, a line could represented it

If the country has not a good economy, the inflationary index is escalating , in special circumstances the behavior is not linear, is something else.