Circle a equation in a straight line

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Discussion Overview

The discussion revolves around the interpretation of the phrase "circle an equation in a straight line" in relation to a set of equations provided by the original poster. The equations include both linear equations and parabolas, leading to confusion about the intended meaning and the concept of circling in this context.

Discussion Character

  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • The original poster lists five equations, including three linear equations and two parabolas, but does not clarify what is meant by "circle an equation in a straight line."
  • Some participants express confusion over the request and ask for clarification on the original problem.
  • One participant suggests that "to circle" may mean to identify or highlight the equations that represent straight lines.
  • Another participant explains the characteristics of straight-line equations, noting that they do not contain exponents, while the parabolas do.
  • There is a consensus that the equations include no circles, but the meaning of circling remains unclear.

Areas of Agreement / Disagreement

Participants generally agree that the equations consist of both linear equations and parabolas, but there is no consensus on the meaning of "circle an equation in a straight line." The discussion remains unresolved regarding the original request.

Contextual Notes

Participants note the lack of clarity in the original question and the potential misunderstanding of the term "circle." The discussion highlights the need for clearer communication of mathematical concepts.

Abdullah Qureshi
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how to circle a equation in a straight line
y= 2x-1
y = x^2+ 2
x –y = 1
x = y + 5
y = – x^2 + 5

pls help me
 
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You’ve posted the equations for three lines and two parabolas.
I have no idea what you are asking with regard to a circle.
Please translate the original problem to English and post it.

D2FA1FE9-2AF0-4A44-8E5B-E1DD3C205955.png
 
skeeter said:
You’ve posted the equations for three lines and two parabolas.
I have no idea what you are asking with regard to a circle.
Please translate the original problem to English and post it.

https://www.physicsforums.com/attachments/11038
Can you without the graph
 
Do what?
 
Are you asking which of the five equations are lines?
 
Abdullah Qureshi said:
how to circle a equation in a straight line
I don't understand what "to circle an equation in a straight line".
means.

y= 2x-1
This is the equation of a straight line.

y = x^2+ 2
This is the equation of a parabola.

x –y = 1
This is the equation of a straight line.

x = y + 5
This is the equation of a straight line.

y = – x^2 + 5
This is the equation of a parabola.

pls help me
There are NO circles.
 
It possibly means to encircle the equations forming straight lines.
 
skeeter said:
Do what?
Without making a graph. It can be use as simple way like trigonometry
 
Straight-line equations, or "linear" equations, graph as straight lines, and have simple variable expressions with no exponents on them. If you see an equation with only x and y, then you're dealing with a straight-line equation. As opposed to, say x² or √x .
The second and the last equations posted above have exponents, so they are not forming straight lines. The rest of them are. You can encircle the rest!
 
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