For the data $(0,100),(1,200),(2,220),(3,220),(4,250),(5,280)$, where the first number in parenthesis is $t$ and the second number is the actual demand, if we fit a trend line of the form $y t=a+b t$, the value of a
A) must be 100
B) must be between 100 and 200
C) can be calculated using the formulae
D) will not be exactly equal to 100
E) C and D

Question

Quizplus · Accepted Answer

The value of $a$ in a linear trend line equation $y = a + bt$ can be calculated using specific formulas that involve the data points given. It is not necessarily equal to the first y-value (100 in this case) because it depends on the overall trend of the data, not just the starting point.

For the Data (0,100),(1,200),(2,220),(3,220),(4,250),(5,280)(0,100),(1,200),(2,220),(3,220),(4,250),(5,280)(0,100),(1,200),(2,220),(3,220),(4,250),(5,280) , Where the First Number in Parenthesis Is

For the Data $(0,100),(1,200),(2,220),(3,220),(4,250),(5,280)$ , Where the First Number in Parenthesis Is