Tengo estos problemas de algebra alguien que me atude porfavor !?

Choose the correct slope of the line that passes through the points (1, -3) and (3, -5)

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

Which questions would most a reader identify the author's purpose for writing? check all that apply. what type of text is this? what type of reviews did the book receive? how many copies of the book have been sold? what is the central idea? how does this text make one feel?