Question

A student found the slope of a line that passes through the points (3, 15) and (5, 9) to be -1/3. What mistake did he make?

A. He used the negative reciprocal of the slope.
B. He added a negative sign.
C. He used the reciprocal of the slope.
D. He did not make a mistake. That is the correct slope.

Answer 1

@MrNood @Ms-Brains @nincompoop

Answer 2

@retirEEd hii

Answer 3

Can you calculate the correct slope?

Answer 4

yes?

Answer 5

What is it?

Answer 6

-1/3?

Answer 7

No, that was the incorrect slope use ....

slope = (y2-y1) / (x2-x1)

Answer 8

-3?

Answer 9

That's correct. So what mistake did the student make?

Answer 10

C?

Answer 11

That's what I think.

Answer 12

medal (:

Answer 13

can u help with a couple more?

Answer 14

If you show me your work I will continue to help.

Answer 15

ok (:

Answer 16

What is the point-slope equation of the line with slope -12 that goes through the point (5, 3)?

A. y - 3 = -12(x - 5)
B. y + 3 = -12(x + 5)
C. y + 3 = 12(x + 5)
D. y - 3 = 12(x - 5)

Answer 17

A?

Answer 18

Why? I am not very familiar with this form. I like slope intercept form better.

Answer 19

its too much to type out ):

Answer 20

i see it is going to be either A or B since I see the -12x.

Answer 21

I'm trying to graph these on my TI-84

Answer 22

yea i GF said it was A

Answer 23

so i think that is the correct one

Answer 24

I got A also.

Answer 25

Are you sure you need help? You are better at these than me.

Answer 26

lol i like the have a second opinion on things