Which table represents a linear function?

Need solving this second acceleration problem.

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

Could someone me with this question i’ve been stuck on it for 20 minutes