Which is the slope of a line perpendicular to the line 7x + y equals 9

slope = 1/7

Step-by-step explanation:

7x+y=9 you should be in slope int form--> y=-7x+9

then the line is perpendicular so

the slope is 1/7

To find this, you must first of all make y the subject of the formula i. e

from the equation subtract 7x from both side

which implies: 7x - 7x + y = 9 - 7x

y = 9 - 7x

Note: If M1 denote a slope and M2 another slope, for the two slopes to be perpendicular M1 = - 1/M2

The slope in the above solution is - 7 so the slope of a line perpendicular to it is - 1 / -7 which is 1/7