Answer:
8.0
Step-by-step explanation:
Answer:
You would click (1,-5)
Step-by-step explanation:
The absolute minimum is the lowest point of the graph.
In all graphs, if it says minimum, it almost certainly means that lowest point, and if there are more than one, you would simply click on those.
It does not matter how many points there are, only that they are the lowest.
Therefore, it would be 1,-5.
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
Linear Regression is an approach for modeling the relationship between a scalar dependent variable y and one or more explanatory variables denoted x. the case of one explanatory variable is called simple linear regression