Question 892380
You made a mistake in your calculation.
{{{4/1=-(4/5)x}}}
{{{-(4/5)x=4}}}
Multiply both sides by {{{(-5/4)}}}
{{{-(4/5)(-5/4)x=4(-5/4)}}}
{{{x=-5}}}
You already know that {{{y=5}}} and you now solved that {{{x=-5}}} so the point of intersection is ({{{-5}}},{{{5}}})
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{{{drawing(300,300,-10,2,-2,10,grid(1),circle(-5,5,0.3),graph(300,300,-10,2,-2,10,-(4/5)x+1,5))}}}