Question

What is the equation of the blue line? Mathswatch question

Answer 1

Given :   Graph

To Find: Equation of Blue Line

Solution:

from Graph :

x = 0  , y = - 1

x = - 1   y =  2

Slope of line   =  ( 2 - (-1)) /(-1 - 0)

=3 /(-1)

= - 3

y  - (-1) = - 3(x - 0)

=> y + 1 = -3x

=> 3x  + y  + 1 =  0

3x  + y  + 1 =  0 is the Equation of the line

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