(16)m=β7,b=2 where m is the slope and b is the y-intercept
(17)m=5,b=4 where m is the slope and b is the y-intercept
(18)m=β1,b=9 where m is the slope and b is the y-intercept
(19)m=15,b=0 where m is the slope and b is the y-intercept
(20)m=β23,b=1 where m is the slope and b is the y-intercept
(21)m=43,b=β5 where m is the slope and b is the y-intercept