Someone me with this ! i have to find the diameter of a circle given the equation

What is the correlation coefficient between the variables? round to three decimal places. enter your answer in the box

What is the slope of the line shown below?

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.