Anormal probability plot suggests that a normal probability model is plausible when:
a) no obvious patterns are present in the plot
b) a bell-shaped pattern is present in the plot
c) a substantial linear pattern is present in the plot
d) a substantial quadratic pattern is present in the plot
first you put it into an equation (40x + 20=? )
plug in what you know, in this case x=3.
40(3) + 20= ?
40 times 3 equals 120. 120 plus 20 equals 140.
40(3) + 20= 140