A Simple yet complicated question.

  • Context: High School 
  • Thread starter Thread starter Poweranimals
  • Start date Start date
Click For Summary

Discussion Overview

The discussion revolves around the problem of finding the slope of a line passing through two points and determining whether the line rises or falls. Participants explore the calculation of the slope, the necessity of simplification, and the implications of the slope's sign in relation to the line's direction. The context includes homework-related inquiries and mathematical reasoning.

Discussion Character

  • Homework-related
  • Mathematical reasoning
  • Debate/contested

Main Points Raised

  • One participant calculates the slope as -2/2 and concludes it falls, but questions whether simplification is necessary.
  • Another participant criticizes the lack of detail in the question and suggests that the inquiry may be an attempt to complete homework improperly.
  • Several participants provide the formula for calculating the slope, m = (y2 - y1) / (x2 - x1), indicating its importance in determining the line's behavior.
  • It is noted that a negative gradient indicates a falling line, while a positive gradient indicates a rising line.
  • One participant expresses confusion about whether to simplify the slope and how that affects the interpretation of rising or falling.
  • A later reply corrects a calculation error regarding the simplification of -2/2, clarifying that it simplifies to -1, which indicates a specific rate of descent.

Areas of Agreement / Disagreement

Participants express differing views on the necessity of simplification and the interpretation of the slope's value. There is no consensus on whether the original question provides sufficient detail or clarity.

Contextual Notes

Some participants express uncertainty about the implications of simplification on the interpretation of the slope, and there are unresolved questions regarding the clarity of the original problem statement.

Poweranimals
Messages
68
Reaction score
0
The problem is "Find the slope of the line passing through the two points and indicate whether the line rises or falls."

Now I figured out that the answer was -2/2,= -2 and that it falls, but I'm not sure if they want me to simplify in this particular case. Any ideas? Because the answer can simplifly to -1 and falling.
 
Physics news on Phys.org
First off, the question makes no sense. You didn't give us enough detail.

Second off, it looks to me like you are just getting your homework done on here, which isn't allowed. This is the 2nd post I've seen which resembles quesitons like this.

Paden Roder
 
well, all you have to do is get the gradient...

[tex] m = \frac {y_2 - y_1} {x_2 - x_1}[/tex]
 
Last edited by a moderator:
futb0l said:
well, all you have to do is get the gradient...

[tex] m = \frac {y_2 - y_1} {x_2 - x_1}[/tex]
That's what I did. Just wasn't sure if I needed to simplify it or not. I'm still having trouble getting this down as I'm studying for a big test.
 
Well then, if the gradient is negative, it will be falling and it if it's positive it will be rising.
Since the gradient has the same meaning as the 'rate'.

If the rate of water from the tank is decreasing by 35mm (having a gradient of -35)...
then the water level will be falling.
 
Falling was my conclusion, but it also asks by how much it is rising of falling. The answer to my equation was -[tex]\frac {2_2}[/tex] but that can be reduced to -[tex]\frac {1/1}[/tex]. Although, since this is graphing, I wasn't sure if that was necassary.
 
Last edited:
Simplify it, then look at the result to determine how fast it's rising or falling. Usually you leave it as an improper fraction (like 5/2), but you make sure it's a simplified improper fraction (not like 10/4).

A slope of -1 means it falls down one unit for every unit you move to the right. A sloe of 1 means it climbs one unit for every unit you move to the right. A slope of -2/3 means it falls two units for every three units you move to the right.
 
Poweranimals said:
Now I figured out that the answer was -2/2,= -2 and that it falls, but I'm not sure if they want me to simplify in this particular case. Any ideas? Because the answer can simplifly to -1 and falling.

-2/2 = -2 is certainly wrong:
-2/2 = -1

When you go 2 to the "right" you go 2 down, so the slope is minus 1. The slope would be minus 2 if you would have to go 2 down when you go 1 to the right.
 

Similar threads

  • · Replies 53 ·
2
Replies
53
Views
7K
  • · Replies 12 ·
Replies
12
Views
4K
  • · Replies 20 ·
Replies
20
Views
2K
  • · Replies 14 ·
Replies
14
Views
3K
  • · Replies 4 ·
Replies
4
Views
3K
  • · Replies 13 ·
Replies
13
Views
3K
  • · Replies 4 ·
Replies
4
Views
7K
  • · Replies 39 ·
2
Replies
39
Views
3K
  • · Replies 5 ·
Replies
5
Views
3K
  • · Replies 2 ·
Replies
2
Views
3K