You can set up a proportion that looks like 3/7 = x/21. X being the number that you are trying to find. Seven goes into 21 three times. So multiply 3 also by that 3 to get 9. So three sevenths of twenty-one is 9.
Using the equation of the line
y -yo = m (x-xo)
We substitute xo,yo and the slope
y -5 = -8(x-1) .....> y = -8x +8 +5 = -8x +13
y = -8x +13
<span> the mean absolute deviation is the average absolute deviation from the mean and is a common measure of forecast error in time series analysis. </span>
<h2>Answer:</h2><h2>good to know</h2><h2 /><h2>thx :)</h2>
