Answer:
y - 2 = -3(x - 1).
y = -3x + 5.
3x + y = 5.
Step-by-step explanation:
The slope of the line is (-1-2) / (2 - 1)
= -3.
Using the point slope form of the equation of a straight line:
y - 2 = -3(x - 1) This is one way to write it.
Simplifying the above:
y = -3x + 3 + 2
y = -3x + 5. This is another way called the slope-intercept form.
Now we convert this to the standard form:
y = -3x + 5
y + 3x = 5
3x + y = 5.
