What information is being shown on the graph above ​

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

$450 i think. hope this ☺

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