As the exterior angles always add up to 360, you can find the number of sides by dividing 360 by the measure of your exterior angle, 30. This gives you 360/30=12, meaning your polygon has 12 sides.
Solve the second equation using the given choices:
Y = 3x + 6
Replacing x with the given choices and matching the y values the answer is the second choice
(0,6) and (-2,0)
D. 4 This is where the exponential line on the graph hits the y axis.