Posted by Barbara Passmore on .
Find the equation of a line that contains (2, 2) and is perpendicular to y= x+3

Prealgebra 
Reiny,
Since it is perpendicular its slope must be +1
equation:
y = x + b
but (2,2) lies on it, so
2 = 2+b
b = 0
the new equation is y = x