Marking as brainliest

Slope= -9

Step-by-step explanation:

To find the slope, you need to find two points on the line, so it would be (-1,4) and (0,-5)

You can use the formula and substitute the coordinates

Y2-Y1/X2-X1

so...

-5-4/0-(-1)

-9/1=-9

or you can find the distance between both points and simplify if needed.

So you move 9 down, and one to the right

-9

Step-by-step explanation:

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

ιт ιѕ:

125.28

нσρє ι ¢συℓρ нєℓρ