Question

Which of the following is the slope between the points (-2, 4) and (2, -2)?

negative three halves

negative two thirds

three halves

two thirds

Answer 1

Have you considered simply calculating that slope?

Answer 2

good idea

Answer 3

Great! Let's see it.

Answer 4

i got 0,-2? thats wrong and i know it

Answer 5

help please

Answer 6

\(Slope = \dfrac{Change\;in\;y}{Change\;in\;x}=\dfrac{y_{2} - y_{1}}{x_{2}-x_{1}} = \dfrac{-2-4}{2-(-2)}\)

Answer 7

-3,2?

Answer 8

-6/4 = -3/2

Not certain about your use of the comma ",". Does that mean division?

Answer 9

yes so i got it right thx! :) one more question please?

Answer 10

Choose the equation of the line passing through the point (-1, -2) and perpendicular to y = one fourthx + 2.

Answer 11

Where does a comma mean division. I've never seen that usage? What book? What country? What culture?

Answer 12

which one y = 4x - 6

y = -4x - 6

y = -4x + 2

y = 4x

Answer 13

Do you have the Point-Slope form?

Answer 14

look above for question

Answer 15

I saw the problem statement. Now, answer my question.

Answer 16

dont quite understand jus help

Answer 17

I am helping if you answer my question. There are various "forms" for the equation of a line...

Point-Slope
Slope-Intercept
2-Point
Intercept

Which of these are familiar to you?

Answer 18

slope interept

Answer 19

Awesome. Well, you're going to need the Point-Slope for this one.

It is this \((y - y_{0}) = m(x - x_{0})\)

m is the same as y = mx + b. It is just the slope of the line. The point \((x_{0},y_{0})\) is just any point on the line. This is just barely different from the slope-intercept form. With slope-intercept, we know the point \((0,b)\) - the y-intercept. With point-slope, it can be ANY point.

So, where does that leave us?

Answer 20

the 3rd one?

Answer 21

Choose the equation of the line passing through the point (-1, -2) and perpendicular to y = one fourthx + 2.

I presume this means:

Containing the point \((-1,-2)\)
Slope perpendicular to \(y = ¼x + 2\)

Okay, how did you get your answer?

Answer 22

look i dont have all day can you just give me a hint to the answer

Answer 23

I give you hint after hint and you ask for a hint? I'm here for you to learn. I'm a volunteer. If you don't want to learn, you are wasting my time. By definition, I cannot possibly be wasting your time.

you have a point-slope form \((y-y_{0})=m(x-x_{0})\)
You have a point that belongs to your line. \((-1,-2)\) This gives \((y+2)=m(x+1)\)
What is the slope of your new line?