Vertical and adjacent angles! Need help with 7,8,9 please!

Rose drew a regression line for this paired data set. her line passed through (1, 2) and (3, 5) . what is the equation of rose's regression line?

Using inductive reasoning, what are the next two number in this set? 2,3/2,4/3,5/4,

F. a fair coin is thrown in the air four times. if the coin lands with the head up on the first three tosses, what is the probability that the coin will land with the head up on the fourth toss? a. 0 b. 1/16 c. 1/8 d. 1/2