Answer:
C
Step-by-step explanation:
See pic below for why...
Let the equation representing the function be y = -mx + c; where m is the charge per minute and c is a initial balance.
25.04 = -31m + c . . . . . (1)
19.74 = -64m + c . . . . . (2)
(1) - (2) gives: 5.3 = 33m
m = 5.3/33 = 0.16 (i.e. charge per minute is 16 cents)
From (1), 25.04 = -31(0.16) + c
25.04 = -4.96 + c
c = 25.04 + 4.96 = 30 (i.e. initial balance is $30)
Remaining credit after 85 minutes call is -85(0.16) + 30 = -13.6 + 30 = $16.40
The lowest points of the graph are at x= -2 and x=4
at those points, the values of the local minimum are y= -3 and y= -5
The answer is going to be D.
This is because they all sides are congruent and the same length :D
Hope this helps :D
mean is when you add everything and then divide by the total amount of numbers there are. Add all the decimals and divide by 5.