What is the equation of a line with a slope of 4 that passes through point (-2,5)

Mathematics

1 answer:

12345 [234]3 years ago

8 0

Point slope form is: y - y1 = m(x - x1)

So we plug in the point we were given, and use the slope, m:

y -5 = 4(x - 2) ANSWER

Now: y - 5 = 4x - 8,

so: y = 4x - 8 +5

so: y = 4x - 3 ANSWER

(SLOPE INTERCEPT FORM IS: y =mx + b)

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Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

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.

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