Question 177541
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Line eqn: {{{x+2y=-1}}}
Via Slope-Intercept Form: {{{y=mx+b}}}, where{{{system(m=xlope,b=Yintercept)}}}
{{{2y=-1-x}}}---->{{{cross(2)y/cross(2)=(-1-x)/2}}}
{{{y=(-1/2)x-(1/2)}}}
{{{f(x)=0}}}
{{{y=(-1/2)(0)-(1/2)=highlight(-1/2=y)}}}
{{{f(y)=0}}}
{{{0=(-1/2)x-(1/2)}}}
{{{(1/2)x=-1/2}}}
{{{cross(1/2)x/cross(1/2)=(-1/2)/(1/2)=(-1/cross(2)1)(cross(2)/1)}}}
{{{highlight(x=-1)}}}
see graph:
{{{drawing(300,300,-3,3,-3,3,grid(1),graph(300,300,-3,3,-3,3,(-1/2)x-(1/2)),green(circle(0,-1/2,.11)),green(circle(-1,0,.11)))}}}
Thank you,
Jojo</pre>