Which function is graphed below?

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

Need ! give step by step solutions on how to solve number one [tex]\frac{9-2\sqrt{3} }{12+\sqrt{3} }[/tex] number two [tex]x+4=\sqrt{13x-20}[/tex] number three (domain and range) [tex]f(x)=2\sqrt[3]{x} +1[/tex]

1. what is the measure of ∠abc? what is the measure of ∠abd?