The graphh od y=x^2+6x-7 what is the axis of symmetry

How do i do this activity, is appreciated

Nine more than four times a number is the same as one less than twice the number. find the number?

Josh has a rewards card for a movie theater he receives 15 points for becoming a rewards card holder he earns 3.5 points for each visit to the movie theater he needs at least 55 points to earn a free movie ticket which inequality can josh use to determine x, the minimum number of visits he needs to earn his first free movie ticket.