Question

write the equation fo the line through(6,4) that is perpendicular to y = 1/3x - 2?

Answer 1

what is an important property of perp lines?

Answer 2

y = -3x + 22

Answer 3

The clue here will be the line will have an equation y = mx + c, where m is the negative reciprocal of the line y =1/3x -2. then just plug in the values of x= 6 and y=4 to obtain c.

Answer 4

i m getting y = 1/3x +2?

Answer 5

y-4=-3(x-6)
y-4=-3x+18
y=-3x+22

Answer 6

y = mx -mPx +Py

Answer 7

since perp lines have flipped slopes ... and swapped signs; 1/3 becomes -3

y = -3x -(-3)(6) + 4

Answer 8

thx