Can someone help with these two questions

What is the equation of the graph below? y=sec(x)-4

Sundar used linear combination to solve the system of equations shown. he did so by multiplying the first equation by 5 and the second equation by another number to eliminate the y-terms. what number did sundar multiply the second equation by? 2x+9y=41 3x+5y=36

Which of the following is an example of conditional probability