Please help me with this one show me how u get it and the answer please I really I need help please please just tell me how you get it and the answer

What is the rate of change of a line that passes through (2,-5) and (6,-2)?

How many grams the dog will eat in 3 days?

Mrs. avila is buying a wallpaper border to go on all of her kitchen walls. she wants to buy 5 extra feet of wallpaper border than she needs to be sure she has enough. she buys 55.5 feet of the border. the store owner selling the border uses the width of mrs. avila's kitchen to determine that the length of her kitchen must be 14.5 feet.