How do i write an algebraic expression for this table? he get 1/3 plus 1

Can someone answer it, and plot it, for 20 points and brainliest answer? p.s. they're the same ! : )

Which equation matches the graph shown ?

Side xy of triangle xyz is extended to point w, creating a linear pair with ∠wyz and ∠xyz. measure of an exterior angle what is the value of x? 64 80 100 180