Is (6,-10) a solution of y=3x-8

Taking algebra two apex courses and need with these questions

Which point lies on a circle with a radius of 5 units and center at p(6, 1)?

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