SOLUTION: if line PQ passes through (1,2) and perpendicular to y=5x-1, determined the equation of PQ. If the gradient of AB,is 15, 3,and line PQ is parrell to line AB,and passes through

Algebra ->  Graphs -> SOLUTION: if line PQ passes through (1,2) and perpendicular to y=5x-1, determined the equation of PQ. If the gradient of AB,is 15, 3,and line PQ is parrell to line AB,and passes through       Log On


   



Question 1140305: if line PQ passes through (1,2) and perpendicular to y=5x-1, determined the equation of PQ.
If the gradient of AB,is 15, 3,and line PQ is parrell to line AB,and passes through point (-4,5) for the equation of line AB

Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
The slope of a line perpendicular to line with slope 5 is -1/5 (negative reciprocal)
point slope formula y-y1=m(x-x1)
y-2=(-1/5)(x-1)
y=(-1/5)x+11/5 (1/5+2)
The slope of AB is 5; parallel lines have the same slope
y-5=5(x+4), note signs
y=5x+25
graph%28300%2C300%2C-10%2C10%2C-10%2C10%2C5x-1%2C%28-1%2F5%29x%2B11%2F5%29%29