Answer:
y = -3/2x + 3
Step-by-step explanation:
We can get 2 points from the graph
(0,3)
(2,0)
from (0,3) we know that the b in the equation is 3
now to calculate m or slope we use
= -3/2
so we plug our m and b into y = mx + b and get
y = -3/2x + 3
Answer:
14
Step-by-step explanation:
mass of 100 centimeters of copper wire is
so, mass of 1 centimeter of copper wire will be
hence, 14 centimeters of copper wire will provide .28 copper
Answer:
The proportion of infants with birth weights between 125 oz and 140 oz is 0.1359 = 13.59%.
Step-by-step explanation:
When the distribution is normal, we use 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, we have that:
The proportion of infants with birth weights between 125 oz and 140 oz is
This is the pvalue of Z when X = 140 subtracted by the pvalue of Z when X = 125. So
X = 140
has a pvalue of 0.9772
X = 125
has a pvalue of 0.8413
0.9772 - 0.8413 = 0.1359
The proportion of infants with birth weights between 125 oz and 140 oz is 0.1359 = 13.59%.