Through (1,1) parallel to y=-x

Question

Write the slope intercept form of the equation of the line described

Answer 1

y = mx + b

 

Parallel lines have the same slope, so

 

m = -1

 

y = -x + b

 

Use the given point to find b.

 

1 = -(1) + b

 

b = 2

 

y = -x + 2

 

Test the answer.