A test has 20 questions how many do you need to answer correctly in order to get 4/5 of them right
2 answers:
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Answer:
a. MSE = 64.8
b. Forecast for month 8 is 14.
Step-by-step explanation:
where
Using the most recent value as the forecast for the next period, we have forecasts for the months as;
(1,-) , (2,25) , (3,13) , (4,21) , (5,13) , (6,20) , (7,22)
= (-, -12, 8, -8, 7, 2, -8, -)
= (-, 144, 64, 64, 49, 4, 64, -)
Therefore, MSE = 64.8 (1 decimal place).
The Forecast for month 8 is 14 since we are using the most recent value as the forecast for the next period.
Step-by-step explanation:
If the parabola has the form
(vertex form)
then its vertex is located at the point (h, k). Therefore, the vertex of the parabola
is located at the point (8, 6).
To find the length of the parabola's latus rectum, we need to find its focal length <em>f</em>. Luckily, since our equation is in vertex form, we can easily find from the focus (or focal point) coordinate, which is
where is called the focal length or distance of the focus from the vertex. So from our equation, we can see that the focal length <em>f</em> is
By definition, the length of the latus rectum is four times the focal length so therefore, its value is