Janae' is buying food for a party. She is buying a cheese tray for $4.50 and a few pounds of fruit for $1.99 each. She spends $16.44.
what is the rate of change
please help

The line plot below represents the number of letters written to overseas pen pals by the students at the waverly middle school.each x represents 10 students. how many students wrote more than 6 and fewer than 20 letters. a.250 b.240 c.230 d.220