Question 897439
Gradient or slope:
{{{m=(y[2]-y[1])/(x[2]-x[1])}}}
{{{m=(1-5)/(-4-4)=-4/-8=1/2}}}
Using the point-slope form,
{{{y-5=(1/2)(x-4)}}}
{{{y-5=(1/2)x-2}}}
{{{y=(1/2)x+3}}}
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{{{m=1/2}}}
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{{{b=3}}}
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{{{drawing(300,300,-5,5,-2,8,grid(1),circle(4,5,0.2),circle(-4,1,0.2),graph(300,300,-5,5,-2,8,(1/2)x+3))}}}