What is the slope of this line?

During a bike challenge riders have to collect various colored ribbons each 1/2 mile they collect a red ribbon each eighth mile they collect a green ribbon and each quarter mile they collect a blue ribbion wich colors of ribion will be collected at the 3/4 markrer

What is the angle measure, or angle of depression, between this bird and the bird watcher?

What is the solution to the system of equations? y=1.5-3 y=-x