From the information below the games is over in 3 sets. For Gina to win the match there are 3 possibilities.
1) Gina wins the first 2 sets with probability
2)Gina wins the first set. Looses the next set. Wins the third set.
3)Gina looses the first set. Wins the next 2 sets.
The required probability that Gina wins is the sum of the above 3 probabilities . That is the probability that Gina wins the match is
We may start by putting the given equation in slope-intercept from:
We can now easily identify the slope:
Since parallel lines have the same slope (as you already seem to know), any line with equation
is parallel to the given line. By choosing, for instance, , we get: