Find the sum of 2\sqrt{16}2 16
​
and 4\sqrt{9}4
9
​
in simplest form. Also, determine whether the result is rational or irrational and explain your answer.

Sera sells t-shirts at the beach. she believes the price of a t-shirt and the number of t-shirts sold are related. she has been experimenting with different prices for the t-shirts. she has collected a data set with five pairs of data; each consists of the price of a t-shirt and the number of shirts sold. the independent variable, which will go on the x-axis, is . the dependent variable, which will go on the y-axis, is the