equation in slope-intercept form that contains (4,1) and (-2,-1)

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cianneee cianneee

13-11-2015
Mathematics

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equation in slope-intercept form that contains (4,1) and (-2,-1)

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crisforp crisforp · Answer 1 · 2015-11-13T07:02:23+01:00

crisforp crisforp

13-11-2015

y = mx + b ;

Then, 1 = 4m + b and -1 = -2m + b ;
b = 1 - 4m ;
-1 = -2m + ( 1 - 4m ) ;
-1 = -2m + 1 - 4m;
-1 - 1 = -6m;
-2 = -6m ;
m = ( -2 ) / ( - 6 );
m = 1 / 3 ;
b = 1 - 4 * ( 1 / 3 ) ;
b = 1 - 4 / 3;
b = - 1 / 3 ;
y = ( 1 / 3 )x - 1 / 3 ;

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