Question

Write an equation of a line perpendicular to line CD below in slope-intercept form that passes through the point (−1, 6).

Line CD is shown. C is at 1, 1. D is at 3, 5.

y = −0.5x − 5.5
y = −0.5x + 5.5
y = 2x + 13
y = 2x − 13

Answer 1

I know it can't be C or D because the slope is going to be opposite so I think its A

Answer 2

Line CD is shown. C is at 1, 1. D is at 3, 5.
Did you calculate the slope for this using the slope formula?

Answer 3

No but i know that perpendicular lines have opposite slopes and the line given has a slope of 2

Answer 4

Correct. So the slope of the perpendicular line must be -0.5

Answer 5

A and B has the same slope. That is because we are not done yet. Member, you can use the point slope formula y-y1=m(x-x1) and plug in the slope -0.5 and the given points
You will come up with the correct equation of the line.

Answer 6

@Zale101 thank you so much do you think you could help me with another?

Answer 7

Post it and show me the work you have done.

Answer 8

and no problem :)

Answer 9

For the line segment whose endpoints are X(1, 2) and Y(6, 7), find the x value for the point located 1 over 3 the distance from X to Y.

3.5
3.3
2.7
2.4

Answer 10

I think it is 3.3 @Zale101

Answer 11

Can you show me on how you got 3.3?

Answer 12

Im not very sure i just kind of guesstimated

Answer 13

Did you construct the line for XY?

Answer 14

Yes i did

Answer 15

line segment whose endpoints are X(1, 2) and Y(6, 7). They gave you two points, you can easily construct a line for it.

Answer 16

Can i see it.

Answer 17

https://www.dropbox.com/s/4v7drg55zc91cbf/Screenshot%202015-05-23%2015.14.50.png?dl=0

Answer 18

@Zale101 thats right correct?