Two linear functions of x are shown. Which Statement about the functions is true?
1 answer:
Answer:
OPTION D: The rate of change of Function 2 is less than that of Function 1.
Step-by-step explanation:
From the table, we will determine the equation of function 2.
From the table, g(1) = 14 & g(-3) = - 86
Since, it is a linear function it should have been of the form, y = a + bx.
We will denote Function 2 as g(x).
So, g(1) = 14 = a + b . . . (1)
And g(-3) = -86 = -3a + b . . . (2)
From (1), a = 14 - b
Substituting this in (2), we get:
-86 = -3(14 - b) + b
⇒ - 86 = - 42 + 4b
⇒ - 44 = 4b
⇒ b = -11
So, a = 14 - (-11)
⇒ a = 25
So, equation of function 2 is: y = 25 - 11x.
Hence, Option A and B are eliminated.
In a linear equation of the form, y = ax + b, y - intercept = b.
So, in function 1, y - intercept = 19
And in function 2, y - intercept = -11
Clearly, OPTION C can be eliminated.
Now, rate of change of Function 1 =
and rate of change of Function 2 =
Therefore, we can say that the rate of change if function 2 is less than that of function 1.
Option D is our answer.
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Answer:
There is a 29.27% probability that the flight is overbooked. This is not an unusually low probability. So it does seem too high so that changes must be made to make it lower.
Step-by-step explanation:
For each passenger, there are only two outcomes possible. Either they show up for the flight, or they do not show up. This means that we can solve this problem using binomial distribution probability concepts.
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.
In which is the number of different combinatios of x objects from a set of n elements, given by the following formula.
And is the probability of X happening.
A probability is said to be unusually low if it is lower than 5%.
For this problem, we have that:
There are 200 reservations, so .
A passenger consists in a passenger not showing up. There is a .0995 probability that a passenger with a reservation will not show up for the flight. So .
Find the probability that when 200 reservations are accepted for United Flight 15, there are more passengers showing up than there are seats available.
X is the number of passengers that do not show up. It needs to be at least 18 for the flight not being overbooked. So we want to find , with
. We can use a binomial probability calculator, and we find that:
.
There is a 29.27% probability that the flight is overbooked. This is not an unusually low probability. So it does seem too high so that changes must be made to make it lower.