In geometry, what's the difference between a postulate and theorem?

Lines p and q intersect. find the value of b. show your work. cite any theorems you use.

Can someone check if i did this right since i really want to make sure it’s correct. if you do you so much

The customer price index(cpi), which measures the cost of a typical package of customer goods,was 208.8 in 2011 and 244.1 in 2016.let x=11 corresponding to the year 2011 an estimate to cpi into 2013 and 2014. assume that the data can be modeled by a straight line and the trend to continue idenfinitely.use data points to find such a line and then estimate the requested quantities