What is the equation of a vertical line passing through the point (−4, 7)? y = 7 y = −4 x = 7 x = −4
2 answers:
Answer: The correct option is
(D)
Step-by-step explanation: We are given to find the equation of a vertical line passing through the point (-4, 7).
We now that
a vertical line is always parallel to the y-axis and is of the form
Since the given vertical line passes through the point (-4, 7) so from equation (i), we have
Substituting the value of k in equation (i), we get
Thus, the required equation of the line is
Option (D) is CORRECT.
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Answer:
y = -7x
Explanation:
Take two points from table: (-4, 28), (-3, 21)
Find slope:
Now find equation:
Answer:
So the p value obtained was a low value and using the significance level given we see that
so we can conclude that we have enough evidence to reject the null hypothesis, and we can said that at 5% of significance the proportion of chips that fail in the first 1000 hours of their use is not significantly less than 0.48.
Step-by-step explanation:
Data given and notation
n=1200 represent the random sample taken
estimated proportion of chips that fail in the first 1000 hours of their use
is the value that we want to test
represent the significance level
Confidence=95% or 0.95
z would represent the statistic (variable of interest)
represent the p value (variable of interest)
Concepts and formulas to use
We need to conduct a hypothesis in order to test the claim that the true proportion si less then 0.48:
Null hypothesis:
Alternative hypothesis:
When we conduct a proportion test we need to use the z statistic, and the is given by:
(1)
The One-Sample Proportion Test is used to assess whether a population proportion is significantly different from a hypothesized value .
Calculate the statistic
Since we have all the info requires we can replace in formula (1) like this:
Statistical decision
It's important to refresh the p value method or p value approach . "This method is about determining "likely" or "unlikely" by determining the probability assuming the null hypothesis were true of observing a more extreme test statistic in the direction of the alternative hypothesis than the one observed". Or in other words is just a method to have an statistical decision to fail to reject or reject the null hypothesis.
The significance level provided . The next step would be calculate the p value for this test.
Since is a left tailed test the p value would be:
So the p value obtained was a low value and using the significance level given we see that
so we can conclude that we have enough evidence to reject the null hypothesis, and we can said that at 5% of significance the proportion of chips that fail in the first 1000 hours of their use is not significantly less than 0.48.