What the slope of (15,9) (-10,3)

Which system of linear inequalities is represented by the graph?

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling