He vertices of a triangle are formed by the intersections of the following three lines: y=x
x=6
y=−13x+4.

Graph the triangle and its image after the composition.

Rotation: 270∘ about the origin

Reflection: in the y-axis

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step-by-step explanation:

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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