1 Answer

Israel Kusayev · Answer 1 · 2021-11-17T11:20:18+0000

Answer:

y=72.99+28.45(x-1).

Explanation:

If we are to write an equation of the form
y=c+d(x-1) , then the function is linear; therefore, it has a constant slope
.

The slope
of the function is given by

$d= (\$101.44-\$72.99)/(2-1)$

$\boxed{ d=28.45}$

thus we have

y=c+28.45(x-1).

Now we find
from the fact that the first month of service costs $72.99, which gives us
(x,y)= (1, 72.99) , or

$\$72.99=c+28.45(1-1)$

$\boxed{c=72.99}$

Substituting the values of
and
, we get our equation in the final form:

$\boxed{ y= 72.99+28.45(x-1)}$

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