Can some one help me please

What is the slope of the line that contains the points (4,8) and (9,8)? what type of line is it?

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?

Which best describes the function on the graph? direct variation; k = −2 direct variation; k = -1/2 inverse variation; k = −2 inverse variation; k = -1/2