Answer:
Slope is - 2 because The slope-intercept form is y=mx+b where m is the slope value. In the equation y=-2x , the m value is - 2 .
X - y = 6x = y + 2Solve the system of equations by substitution.
1 answer:
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Answer:
A sample size of 474 is required.
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of , and a confidence level of
, we have the following confidence interval of proportions.
In which
z is the z-score that has a p-value of .
The margin of error is of:
Based on previous evidence, you believe the population proportion is approximately 73%.
This means that
95% confidence level
So , z is the value of Z that has a p-value of
, so
.
How large of a sample size is required?
A sample size of n is required, and n is found when M = 0.04. So
Rounding up:
A sample size of 474 is required.