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Answer:
y = -x +1
Explanation:
The given point is 2 units left of the y-axis. The slope of -1 means that a point 2 units right of that (on the y-axis) will be 2(-1) = -2 units vertically from y=3.
That is, the line will cross the y-axis at y=3-2 = 1. Now, you know the slope is -1 and the intercept is 1, so the equation is ...
y = mx + b . . . . . where m is the slope and b is the y-intercept
y = -x + 1