9.9 line of fit how do you find the slope - intercept and how do u form an equation for these graphs?

If p(a) = 0.70 and p(b) = 0.20, then a and b are independent events if

The average length of a king cobra is 3.7 m. the record length is 1.88 m longer than the average. how long is the record holder?

Aline is perpendicular to another line m2= (-1/m1), where m1 is the slope of the original line and m2 is the slope of the perpendicular line. which of the following equations represents the line that passes through the point (-2,1) and is perpendicular to the line below?