Given y = -3x + b, and point M (-2, 4):
Substitute the coordinates of Point M into the equation to solve for the y-intercept, b:
y = -3x + b
4 = -3(-2) + b
4 = 6 + b
Subtract 6 from both sides to isolate b:
4 - 6 = 6 - 6 + b
-2 = b
Therefore, the y-coordinate of the y-intercept (0, -2), is:
b = -2
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