Write a word phrase for the algebraic expression 3x-7?

Can someone answer it, and plot it, for 20 points and brainliest answer? p. s. they're the same ! : )

The frequency table shows a set of data collected by a doctor for adult patients who were diagnosed with a strain of influenza. patients with influenza age range number of sick patients 25 to 29 30 to 34 35 to 39 40 to 45 which dot plot could represent the same data as the frequency table? patients with flu

What is the missing reason in the proof? segment addition congruent segments theorem transitive property of equality subtraction property of equality?