Help needed plz and ty

(40 points) i need some . an answer definition is appreciated as well.

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

The area of a rectangle is 15+5y square feet. which of the following expressions could be the length of the sides of the rectangle, in feet a. 5 and 3y b. 5 and 3+y c. 5 and 5+y d. 3 and 5+3y