4.69 Age and Text Messages The scatterplot shows the rela- tionship between age and number of text messages sent in a day. Comment on the appropriateness of linear regression. (Source: StatCrunch: Responses to survey How often do you text? Owner: Webster West) Send = 73.98 - 1.556 Age 300 250 200 . . 150 Send 100 50 0 -50 20 30 40 50 60 70 10 Age