Answer:
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
Step-by-step explanation:
