Which relation is a function
1 answer:
Answer:
Top left one on the attached, must be option A
Step-by-step explanation:
A function has to have unique input values and for each input value has to have an output value.
Analyzing the graphs we can see that only one of them is a function- top left one
All the others have repeat input values, therefore are not functions
All those points marked with red circle
<em>Refer to attached </em>
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Answer:
a)
b) 0.1567
c)
Step-by-step explanation:
We are given the following information in the question:
Mean, μ = $27,293 per year
Standard Deviation, σ = $7,235
We are given that the distribution of cost of college is a bell shaped distribution that is a normal distribution.
a) Distribution of X
Let X be the cost for a randomly selected college. Then,
b) Probability that a randomly selected Private nonprofit four-year college will cost less than $20,000 per year.
Calculation the value from standard normal z table, we have,
c) 70th percentile for the distribution.
We have to find the value of x such that the probability is 0.7
Calculation the value from standard normal z table, we have,
The 70th percentile for the distribution of college cost is $31,084.14
Answer:
0.75 = 75% probability that he will have to wait at a red light for more than 15 seconds
Step-by-step explanation:
At each second, the stoplight is equally likely to change, which means that we use the uniform probability distribution to solve this question.
Uniform probability distribution:
Has two bounds, a and b. The probability of finding a value higher than x is given by:
Red for 60 seconds
So when Jamal arrives it can change in any number of seconds between 0 and 60, that is,
Probability that he will have to wait at a red light for more than 15 seconds?
0.75 = 75% probability that he will have to wait at a red light for more than 15 seconds