Test worth 90 points; test score of 90%
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the first one

Step-by-step explanation:

not 100% sure but a good guess

a. the residual plot for model 1 has a random pattern and is a good fit for the data.

9.55 degrees.

step-by-step explanation:

the given angle is

1 cycle is equal to 2π radians. so 4π will be equal to two cycles.

5.166667π-4π = 1.166667π

hence, this angle goes a little more than negative x axis.

1.166667π-π= 0.166667π

hence, the reference angle is 0.166667π radians.

1 radian = 57.2958 degrees

now, in degrees, this should be equals to 9.55 degrees.