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Straight line equation easy question

  • Thread starter sameh1
  • Start date
  • #1
9
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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
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Answers and Replies

  • #2
13
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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.
 
  • #3
9
0
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.
 
  • #4
13
0
It's not confusing if you look at the picture
 

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