The charge,
C
, in dollars, to use an internet service is a function of
m
, the number of months of use, and
t
, the total number of minutes online.
(a) Is
f
a linear function?
?
Yes
No
(b) What are the units of the coefficient in front of
m
?
A.
dollars
B.
minutes
C.
dollars / month
D.
dollars / minute
E.
minutes / month
F.
months
(c) What are the units of the coefficient in front of
t
?
A.
cents / minute
B.
dollars
C.
minutes / month
D.
dollars / month
E.
dollars / minute
F.
months
G.
minutes
(d) Interpret the
z
-intercept of 25.
A.
charge in dollars / month
B.
fixed months of use
C.
charge in dollars / minute
D.
fixed minutes online
E.
fixed charge in dollars
(e)
dollars.
In order to get credit for this problem all answers must be correct.