Answer: 0.393
Explanation: If the given quantities are r-value (or Pearson's coefficient) and the standard deviations of x and y coordinates, we'll use the following formula for slope:

where:
m = slope of the best fit line
r = r-value = 0.793

= standard deviation of x-coordinates = <span>5.591
</span>

= standard deviation of y-coordinates = 2.772
So, the slope is calculated as follows:

Hence, the slope in 3 decimal places is
0.393.
Answer:
124/67 and 1/3
Step-by-step explanation:
The second ratio is 1.5/4.5, which readily reduces to 1/3.
Dividing both numerator and denominator of 24.8 / 13.4 by 2 yields the simpler 12.4 / 6.7 or 124/67. This latter result cannot be reduced.
Answer:
The store had 200 CDs for sale.
Step-by-step explanation:
I suppose we are to determine the proportionality constant of the variation. The equation for this proportionality is,
y = kwx / z
Substituting the known values,
320 = k(6)(20)/3
The value of k from the equation is 8.
9514 1404 393
Answer:
1/9, 2/8, 3/7, 4/6
Step-by-step explanation:
The fraction will be proper when the numerator is less than the denominator. That means numerators can be less than 10/2 = 5. The fractions that satisfy the requirement are ...
1/9, 2/8, 3/7, 4/6
Those with even numerators can be reduced. So the reduced fractions are ...
1/9, 3/7