Which rule describes the relationship between the x- and y- coordinates on the following graph?

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?

Can some one me with these questions

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