Is this a function graph

Which expression is rational? 6. , square root two, square root 14, square root 49

Write the point-slope form of an equation of the line through the points (-2, -3) and (-7, 4).

Barrett is comparing the membership fees for two museums. the art museum charges a one-time fee of $8.25 plus $2.25 per month. the science museum charges a one-time fee of $10.75 plus $3.50 per month. how much does barrett save by joining the art museum instead of the science museum?