This problem requires the point slope
formula:
y - y1 = m(x - x1), where x1 and y1 are the
coordinates of the given point A and m is the slope of the
line.
We'll consider x1 = 1 and y1 = 2
(since the 0 key has the brackets symbol on it, we'll consider 0
as being an error of typing). The slope is m =
1/2.
y - 2 = (1/2)*(x -
1)
We'll remove the
brackets:
y - 2 = x/2 - 1/2
y
= x/2 + 2 - 1/2
y = x/2 +
3/2
The requested equation of the line, whose
slope is m = 1/2 and it's passing through the point A(1,2), is: y = x/2 +
3/2.
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