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| PAGE: 323 | SET: Exercises | PROBLEM: 27 |
The point is 
and the equation of line is 
.
The equation 
is in the form 
where m is slope and b is y - intercept.
Therefore slope of given line is 
.
Because the slopes of perpendicular lines are negative reciprocals, the slope of perpendicular line through 
is 2.
To find the y - intercept, substitute the values of 
in the slope - intercept from of equation 
and solve for b.
Subtract 4 from each side.
.
The y - intercept of perpendicular line is 
.
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