Question

Use the slope formula to find the missing coordinate.
m =fraction 3/5 , P(3, 2) and Q(8,_)

Answer 1

So they tell you your slope is = 3/5, right? So you'll need to set up an equation to find the missing y coordinate. Do you remember the slope formula I showed you?

Answer 2

yea y-y x-x

Answer 3

Okay, so they told you Y-Y/X-X = 3/5

Answer 4

Go ahead and fill in the Y's and the X's

Answer 5

x 8-3 y 2-?

Answer 6

right, you have (Y-2)/(8-3) which is = (Y-2)/5. Now set (Y-2)/5 = 3/5

Answer 7

How would you solve that equation?

Answer 8

by dividing

Answer 9

You have a 5 in the denominator. How would you get rid of that?

Answer 10

subtracting?

Answer 11

No. If you multiplied both sides by 5 you would have 5/5, right?

Answer 12

yes

Answer 13

5(Y-2)/5 = 5*3/5

Answer 14

So whats 5/5 equal to?

Answer 15

1

Answer 16

Right. So what are we left with if the 5's cancel?

Answer 17

There is Y-2 on the left side. What about the right side?

Answer 18

1?

Answer 19

No. You have 1*(Y-2) = 1*3

Answer 20

So you have Y-2 = ?

Answer 21

What is 1 times 3? Or one times any number?

Answer 22

3

Answer 23

so you end up with Y-2=3. Can you solve that?

Answer 24

so its 5-2=3

Answer 25

that's correct. Y = 5

Answer 26

thank you