Question 342889
You just make it negative, as the function shows,
{{{y=-x-1}}}
When {{{x=1}}}, then {{{y=-1-1=-2}}}
({{{-1}}},{{{-2}}})
You could also choose a negative value too.
When {{{x=-1}}}, then {{{y=-(-1)-1=1-1=0}}}
({{{-1}}},{{{0}}})
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You should be able to solve for {{{y}}} given any value of {{{x}}}.