안녕하세요, I’m new to this country and app! Any help will be good

the 2 figures are congruent bc if you reflect abcd over the y axis then over the d axis the figures overlap

if x = 1, then the answer is 3.5

what

this is a direct variation proportion. y = kx

y is the total amount due, k is the constant of variation, and x is the number of texts sent.

plug in the 3.20 and the 16 to solve for the "k". this is the constant of proportionality. it is the value that will not change.

3.20 = k(16). solving you get $.20 per text.

the equation would then be y = .20x