A parabola has a known point on the parabola of P (7, 5) and has an axis of symmetry with the equation h=3. From the given information, which of the following statements is true?
A. The vertex point may be identified.
B. The point (1, 2) is on the parabola.
C. The direction of opening is known.
D. The point (-1, 5) is on the parabola.

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step-by-step explanation:

jhcxzbfzc

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