Answer:
180 degree
Step-by-step explanation:
A straight line is 180 degrees, or a "straight" angle.
So you would plug in 0 for a from the beginning since this is numerical slope definition of a derivative
Answer:
1/3
Step-by-step explanation:
To find the common ratio, take the second term and divide by the first term
9/27 = 1/3
Check by dividing the third term by the second
3/9 = 1/3
and so forth
1/3 = 1/3
etc
The common ratio is 1/3