Question 782057
Slope-intercept form is y = mx + b
m is the slope 
b is the y-intercept


In the line y = 7x + 8
slope = 7


Perpendicular lines have slopes which are negative reciprocals.


Perpendicular slope is -1/7


On the new line, 
slope = -1/7 and the given point is (3,4)


y - y1 = m(x - x1) {point-slope form}
y - 4 = (-1/7)(x - 3) {substituted into point-slope form}
y - 4 = (-1/7)x + 3/7 {used distributive property}
y = (-1/7)x + 31/7 {added 4 to each side}
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