Question

What is the slope of the line that passes through (-2, 7) and (4, 9)?

slope = -1/3
slope = 1/3
slope = 3

Answer 1

would u use the formula
y2-y1/x2-x1

Answer 2

how do u put the numbers in there

Answer 3

the formula means find the difference between the y values (the 2nd number in the pair) in (-2,7) 7 is the y value.

y2 means the value from the 2nd point.
y1 means the y value of the 1st point.

pick on of the points to be 1st, and the other to be second.
(it does not matter which)

Answer 4

then find the difference between the x values.

Answer 5

so whould the answer be -1/3

Answer 6

can you show your work ?

Answer 7

7-(-2)=9
right

Answer 8

9-4=5

Answer 9

when you have time, this goes over how to do it
http://www.khanacademy.org/math/trigonometry/graphs/slope_of_line/v/slope-of-a-line-2

meanwhile, let the 1st point be (-2, 7) and the 2nd point be (4, 9)

what is y2 and what is y1 ?

Answer 10

remember, each point has only 1 y-value, the 2nd number.

Answer 11

y2=7
y1=4

Answer 12

y2 is the y value of the second point. The second point is (4, 9)

what is y2 ?

Answer 13

y2 is the 2nd number in (4,9).

Answer 14

9

Answer 15

now what is y1. y1 is the 2nd number in the first point.

Answer 16

7

Answer 17

y2 -y1 is ?

Answer 18

2

Answer 19

ok now you have y2-y1

we need x2 - x1

x2 is the x value of the second point. the x value is the first number in the pair
what is x2 ?

Answer 20

the 2nd point is (4, 9)
what is x2 ?

Answer 21

9-(-2)

Answer 22

don't jump ahead. we need the x value of the second point.

the second point is (4,9)
what is the first number in (4,9) ? that is the x value?

Answer 23

4

Answer 24

yes, x2 is 4

now what is x1 ? to find x1, look at the first point (-2, 7)
find the x value of that point

Answer 25

Can someone help me with my question?

Answer 26

-2
so it would be
4-2

Answer 27

almost, it would be 4 - -2

Answer 28

-.- Rude Much!

Answer 29

so it would be 6

Answer 30

yes

you have y2-y1= 2
and x2-x1= 6

now we find change in y divided by change in x
2/6

can you simplify that ?

Answer 31

1/3

Answer 32

thank u so much