Answer:
Following are the responses to the given question:
Step-by-step explanation:
Mean Absolute Deviation MAD
Mean squared error
linear trend equation is 

Naive method

Please find the attached file.
3pi/4 is 135 in degrees. A 135-degree angle lies in quadrant 2. In quadrant 2, the x values are negative and the y values are positive.
Answer:
-215
Step-by-step explanation:
-w = 215
w = -215
hope this helped
Answer:
mhhh
Step-by-step explanation: