How can you find the unit rate on a graph that goes through the origin ?

The table respent two linear functions the equation respented by the first tables is given

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.

Abcd is a square. what is the measure of angle bac