SOLUTION: How would I write the equation in standard form where slope = -1;(0,7)

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Question 160081This question is from textbook Prentice-Hall Algebra 2
: How would I write the equation in standard form where slope = -1;(0,7) This question is from textbook Prentice-Hall Algebra 2

Answer by nerdybill(7384) About Me  (Show Source):
You can put this solution on YOUR website!
standard form where slope = -1;(0,7)
.
Plug what was given into the "point-slope" form then convert into the "standard form".
.
"standard form":
Ax + By = C
.
"point-slope form":
y – y1 = m(x – x1)
.
Plug in our given info:
y – 7 = (-1)(x – 0)
.
Now, converting to "standard form":
y – 7 = (-1)(x)
y – 7 = -1x
y = -x + 7
x + y = 7 (this is what they're looking for)