Saul uses technology to construct a perpendicular line through a point on the line. Gwen uses a compass and straightedge to construct perpendicular lines. In your own words, describe how Saul's construction steps will be similar to Gwen's construction steps?

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

i believe it is the square root of 122 because when you turn it on it's side, to where the 5 inches is on the bottom, it looks like it is the same length.