Find the equation of a parabola with a focus at (-4,7) and a directrix
of y=1.

sorry can't

step-by-step explanation:

i googled though and something came up but it was in science langueage not common english sooo

0.85% : )

step-by-step explanation:

the answer is b

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