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Answer:
y = -x -1
Step-by-step explanation:
The slope of a line is the tangent of the angle it makes with the x-axis. If you want an angle of -45°, then you need a line with a slope of m = tan(-45°) = -1.
Then the y-intercept is ...
b = y -mx
b = 2 -(-1)(-3) = 2 -3 = -1
So, the slope-intercept equation is ...
y = mx + b
y = -x -1
