Which linear regression equation best fits the given points? (0,4), (1,4), (2,5), (3,6), (4,6), (5,6), (5,7), (6,7) yˆ= 1/2x − 1 yˆ= −1/2x + 4 yˆ= −1/2x yˆ= 1/2x + 4

You have to know how to enter this into your calculator.  Step by step: hit the stat button and then edit.  Enter your x values one at a time in the first column, hitting enter after each value.  When finished with x's, arrow over to the second column and enter each y value in, one at a time, hitting enter after each value.  When you're done, hit stat again, tab over to calc and hit enter.  You will then arrow down to LinReg(ax+b).  Hit enter.  If you have a TI 83, then the equation should just generate automatically.  If you have a TI84 family, you need to arrow down to "calculate" and then hit enter.  Your equation will then generate.  It is the last choice above, y = 1/2x + 4.  Learn how to use your calculator; it can do SO many cool things for you!!!

The length is 23 and y because you add them together

These are the multiples of 15 but what you are probably asking or what are the factors of 15