Straight line equation easy question

Click For Summary

Homework Help Overview

The discussion revolves around understanding the equation of a straight line, specifically the equation y = -2x + 2. Participants are exploring how to derive the equation from given information, including the slope and y-intercept.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants discuss the relationship between the slope and the y-intercept, with one questioning how to derive the constant term in the equation. Others clarify the meaning of the y-intercept in the context of the equation.

Discussion Status

Some guidance has been offered regarding the interpretation of the y-intercept, while there appears to be some confusion about the slope and its implications for the equation. Multiple interpretations of the original question are being explored.

Contextual Notes

There is a mention of an attached file that may provide additional context, but its contents are not discussed in detail. The clarity of the original question is questioned by some participants.

sameh1
Messages
9
Reaction score
0
i have an easy question i Know how to calculate the slope but how I can get all the equation I know before that the equation is -2x+2 I know how to calculate the slope it
is y2-y1/x2-x1 but how can I get +2
I attach a file describing the question
 

Attachments

  • scan0084.jpg
    scan0084.jpg
    4.1 KB · Views: 422
Last edited:
Physics news on Phys.org
The constant is the same as the point where the line crosses the y-axis. So in this case you see it crosses at positive 2 so the constant will be +2.
 
your question is somewhat confusing...if you are asking how to get a slope = 2, you need a different line. the slope of a straight line is constant. y = -2x +2 is a straight line and you calculated the slope correctly, -2.

To find a line with slope = 2, use slope equation...y=mx+b.
 
It's not confusing if you look at the picture
 

Similar threads

Confusion about the equation of a line in space (vector form)
  • · Replies 23 ·
Replies
23
Views
3K
At what ##x## value is the tangent equally inclined to the given curve?
  • · Replies 5 ·
Replies
5
Views
1K
Find the equation of a tangent line to y = x^2?
  • · Replies 11 ·
Replies
11
Views
5K
Equation of a line - Difficult problem from Thomas Calculus
  • · Replies 8 ·
Replies
8
Views
2K
What is the interval for a so that the given line is normal to the hyperbola?
  • · Replies 4 ·
Replies
4
Views
2K
Calculate this Integral around the Circular Path using Green's Theorem
  • · Replies 3 ·
Replies
3
Views
2K
Is (y + z)x1 = (y1 + z1)x the equation of a straight line in 3D space?
  • · Replies 17 ·
Replies
17
Views
3K
Why Are There No Solutions to This Vector Equation Problem?
  • · Replies 5 ·
Replies
5
Views
2K
Find the differential equation
  • · Replies 7 ·
Replies
7
Views
2K
Slope of a curve and at a point
  • · Replies 14 ·
Replies
14
Views
2K