Convert the angles to degrees. Remember there are 2pi radians in a circle, and a circle has 360 degrees, so conversion factor is 180degrees/pi. Then you can easily approximate the reference angle. Remember you make the reference angle from the positive x-axis and the reference angle will be the angle between the terminal side and the nearest x-axis (either positive side or negative side of the x-axis).
1)

2)
It's a linear function with a slope 0.
It's a horizontal line (look at the picture).
Answer:
14x+6
Step-by-step explanation:
Multiply 7x by 2 which gets you 14x and multiply 3 by 2 which is 6.
Answer:
7.40 for 5 liters
Step-by-step explanation:
2.98/2= 1.49
7.40/5= 1.48
Hope this Helps :)
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