Question

Is 2 the slope of (2, -3) and (6, 5)?

Answer 1

I got y = 2x + -7 for the slope intercept form, can someone verify this for me?

Answer 2

y = 2x - 7 is the equation that goes through those two points, nice work

Answer 3

Check:

y = 2x - 7

-3 = 2(2) - 7 ... plug in x = 2 and y = -3

-3 = 4 - 7

-3 = -3

So (2,-3) is on the line y = 2x - 7

Answer 4

Check:

y = 2x - 7

5 = 2(6) - 7

5 = 12 - 7

5 = 5

and (6,5) is also on the line y = 2x - 7

Answer 5

Both points are on the line y = 2x-7, so that fully confirms the answer

Answer 6

Can you help me with a few more questions?

Answer 7

Write the equation of the line given the slope and the y-intercept. Type your answer in the box without skipping any spaces. m = 2, y-intercept (0, -9)

I got y=2x+-9

Answer 8

which is y = 2x - 9, nice job

Answer 9

Finish writing the equation of the line y=1/4 x+?____, given the points (-12, 0) and (4, 4)

Answer 10

I have no idea how to do that :(

Answer 11

pick any point you want of the two, which one do you pick?

Answer 12

-12

Answer 13

the first one you meant?

Answer 14

(-12, 0) right?

Answer 15

Yes

Answer 16

ok (-12,0) means x = -12 and y = 0

Answer 17

y=1/4 x+ b

0 = (1/4)(-12)+ b

0 = (1/4)(-12/1) + b

0 = -12/4 + b

0 = -3 + b

..

...

b = ???

Answer 18

3?

Answer 19

good

Answer 20

y=1/4 x+?____

turns into

y=1/4 x+3

Answer 21

My last question...

Answer 22

If a line has a slope of -2/5 then would a perpendicular line have a slope of 2/5?

Answer 23

flip the fraction and flip the sign

Answer 24

-2/5 ---> -5/2 ----> 5/2

Answer 25

original slope: -2/5

perpendicular slope: 5/2

Answer 26

Ohhh, ok then. I get it now

Answer 27

the goal is the two slopes multiply to -1

Answer 28

Right

Answer 29

Well thank you so much for all you're help! :D

Answer 30

you're welcome