Does y=-2x represent a function

What is the slope of the equation y =

Divide. write in the simplest form. 4 1/6 divided by 10

1) in triangle the, what is the measure of angle t (in degrees)? 2) in triangle bat, the measure of angle b is 66∘, and the measure of angle t is 77∘.what is the measure of the exterior angle at a (in degrees)?