Question

I WILL FAN AND GIVE A MEDAL!!
Can someone please help me? My teacher said that need to redo this problem but I don’t know how…
I’ll add the Question then My Answer then My Teachers response.

Answer 1

Find the point-slope form of the equation that goes through these two points.

(1, 20) and (8, 4.5)

Answer 2

My Answer~
Y2-y1/x2-x1

4.5-20/8-1

-15.5/7

=2.21428571429

=2.21

Answer 3

Let's focus on that first. You're given 2 points, and are to find the SLOPE of the line that goes thru them.

Answer 4

u seem to have dropped the negative sign...

Answer 5

What my teacher said~
"not finished"

Answer 6

Here's some feedback on your work:

That slope formula should be labelled: \[y=\frac{ y _{2}-y _{1} }{ x _{2}-x _{1} }\]

Answer 7

... and "m" would be a better label than "y" because "m" represents slope.

Answer 8

Next, your 4.5-20 / 8-1 is subject to misinterpretation unless you use parentheses around both numerator and denominator:

correct: m = (4.5-20) / (8-1)

not correct: 4.5-20 / 8-1

Answer 9

Your -15.5 / 7 is ok as typewritten by you.

I'd suggest NOT finding the decimal equivalent. Instead, look for a way to reduce -15.5/7 to simpler form. Could you do that now, please?

Answer 10

Hint: 15.5=31/2

Answer 11

I'm not sure how to, I'm sorry i'm really not good with math

Answer 12

For your own self-image, please do not tell others (or yourself) that you're "really not good in math." Instead, you might say, "math has been a bit of a challenge for me, but with effort and practice, I can learn what I need to know about it."

-15.5/7 could be re-written as (-15.5) / 7

and the -15.5 could be re-written as -31/2

So, inside the parentheses you have -31/2:

(-31/2) / 7, or (easier to read):\[\frac{ \frac{ -31 }{ 2 } }{ 7 }\]

Answer 13

can you simplify that? Hint: re-write the 7 as 7/1. Then divide:\[\frac{ \frac{ -31 }{ 2 } }{ \frac{ 7 }{ 1 } }\]

Answer 14

-2 3/14?

Answer 15

Hints: Leave the -31/2 as is. Invert the 7/1 in the denominator and multiply the result by -31/2.

Answer 16

Your result is correct. It'd be a bit easier to leave it as -31/14.

Answer 17

Personally, I'd leave your answer in that latest form, and not convert that to a decimal fraction.

Answer 18

OK with this?

Next problem?

Answer 19

could you give me a second so I can look through the steps we just did?

Answer 20

sure. I need a bit of time to make a phone call. return when you're ready.

Answer 21

So I re-wrote the steps that we just did, would you mind looking at them to see if I wrote them right?

Answer 22

OK. type them in as quickly as you can. Thx.

Answer 23

Find the point-slope form of the equation that goes through these two points.
(1, 20) and (8, 4.5)
My Answer~
Y= y2-y1/x2-x1
(4.5-20)/(8-1)
=
-15.5/7
Rewrite -15.5/7 as (-15.5)/7
Rewrite -15.5 as -31/2
=
-31/2
7/1
Divide:
-31/2
7/1
=
-31/14

Answer 24

Please enclose your " -31/2 " and (separately ) your "7/1" in parentheses and show that you are dividing (-31/2) by (7/1). Currently your work doesn't show the actual division symbol, even though you do use the word "divide."

Answer 25

so like this?
(-31/2)
(7/1)

Answer 26

Yes, except put the division symbol right after (-31/2).

Answer 27

ok

Answer 28

Gotcha. I need to get off the 'Net, unfortunately, but just might be on O. S. again later today. Glad I got to work with you, and I appreciate your interest and perseverance.

Answer 29

umm ok

Answer 30

thank you for your help