.
There are several (more than one) forms of such equations.
One of the forms is
y-(-5) = 1*(x-(-1)),
or
y + 5 = x + 1.
Solved.
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At this site, there is a lesson
- Equation for a straight line having a given slope and passing through a given point
where you can find many similar solved problems with detailed explanations to learn from.
Read it and learn the entire subject once and for all.