Graph the
(16) y = -7x + 2
(17) y = 5x + 4
(18) y = -x + 9
(19) y = 1/5x
(20) y = -2/3x +1
(21) y = 4/3x - 5

(16)m=−7,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=−1,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=−23,b=1 where m is the slope and b is the y-intercept
(21)m=43,b=−5 where m is the slope and b is the y-intercept

The correct answer is -20y