The term $b _ { 1 }$ in the equation $\ddot { y } _ { 2 } = b _ { 0 } + b _ { 1 } t + b _ { 2 } Q _ { 1 } + b _ { 3 } Q _ { 2 } + b _ { 4 } Q _ { 3 }$ , where t represents the predicted value of y at time t, is:
A)the time trend.
B)the seasonal trend.
C)an indicator variable.
D)a value between 0 and 4.

Question

The term $b _ { 1 }$ in the equation $\ddot { y } _ { 2 } = b _ { 0 } + b _ { 1 } t + b _ { 2 } Q _ { 1 } + b _ { 3 } Q _ { 2 } + b _ { 4 } Q _ { 3 }$ , where t represents the predicted value of y at time t, is:
A)the time trend. 
B)the seasonal trend. 
C)an indicator variable. 
D)a value between 0 and 4.

Quizplus · Accepted Answer

The term $b_1 t$ represents the time trend in the equation, as it multiplies the time variable $t$, indicating how the predicted value changes over time.

The Term b1b _ { 1 }b1​ In the Equation y¨2=b0+b1t+b2Q1+b3Q2+b4Q3\ddot { y } _ { 2 } = b _ { 0 } + b _ { 1 } t + b _ { 2 } Q _ { 1 } + b _ { 3 } Q _ { 2 } + b _ { 4 } Q _ { 3 }y¨​2​=b0​+b1​t+b2​Q1​+b3​Q2​+b4​Q3​

The Term $b _ { 1 }$ In the Equation $\ddot { y } _ { 2 } = b _ { 0 } + b _ { 1 } t + b _ { 2 } Q _ { 1 } + b _ { 3 } Q _ { 2 } + b _ { 4 } Q _ { 3 }$