Agiven line has the equation 2x + 12y = −1. what is the equation, in slope-intercept form, of the line that is perpendicular to the given line and passes through the point (0, 9)?

The perpendicular line that passes the line with the equation 2x + 12y = -1 at point (0, 9) has the equation of y = 6x + 9. The slope of the perpendicular line that will pass a certain line will has the negative reciprocal of the slope of that line. 

180°

step-by-step explanation:

sum of equilateral triangle=180°

< n=60°

< m=120°°[angle supplementary of equilateral angle]

< m+< r+< x=360°(sum of exterior angle of triangle)