Identify the slope and y-intercept of each linear function's equation.
-X+ 3 = y
slope = -1; y-intercept at 3
y = 3x - 1
slope = -3; y-intercept at 1
y = 1 - 3x
slope = 1: y-intercept at -3
X-3 = y
slope = 3; y-interceptat -1