I have a quiz pls help

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

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?