Question

erte

Answer 1

you can use y-y1=m(x-x1) the point being (x1,y1) and m=slope

Answer 2

so lets substitute
y-(-5)=-1(x-1) simplify the left side and distribute the right
y+5=-x+1 add x to both sides
x+y+5=1 subtract 5 from both sides"
x+y=-4

Answer 3

slope can also be derived form standard from using -a/b since stnadard form is ax+by=c

Answer 4

so this manner gets rid of the choices A and B since -1/-1=1 not -1

Answer 5

then you could have just plugged the point (1,-5) to see which one gets the value shown in the right side of the equation

Answer 6

both ways give the answer as C