Could someone pleaseeeeeee help?
2 answers:
First I would isolate the "y" in the equation:
x - 4y = 4 Subtract "x" on both sides
-4y = 4 - x Divide -4 to get "y" by itself
or
This is now in slope intercept form, which is:
y = mx + b
"m" being the slope, "b" being the y-intercept (when x = 0)
Your slope is 1/4, and your y-intercept is -1.
The 2nd graph is your answer
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Answer:
The score that separates the lower 5% of the class from the rest of the class is 55.6.
Step-by-step explanation:
Problems of normally distributed samples can be solved using the z-score formula.
In a set with mean and standard deviation
, the zscore of a measure X is given by:
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
In this question:
Find the score that separates the lower 5% of the class from the rest of the class.
This score is the 5th percentile, which is X when Z has a pvalue of 0.05. So it is X when Z = -1.645.
The score that separates the lower 5% of the class from the rest of the class is 55.6.