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What is the equation, in point-slope form, of the line that is parallel to the given line and passes through the point [tex]\((-3,1)\)[/tex]?

A. [tex]\( y - 1 = -\frac{3}{2}(x + 3) \)[/tex]
B. [tex]\( y - 1 = -\frac{2}{3}(x + 3) \)[/tex]
C. [tex]\( y - 1 = \frac{2}{3}(x + 3) \)[/tex]
D. [tex]\( y - 1 = \frac{3}{2}(x + 3) \)[/tex]


Sagot :

To find the equation, in point-slope form, of the line that is parallel to the given line and passes through the point [tex]\((-3,1)\)[/tex], let's follow these steps:

1. Identify the slope of the given line:

The given line is [tex]\(y - 1 = -\frac{3}{2}(x + 3)\)[/tex].
From this equation, we can see that the slope ([tex]\(m\)[/tex]) of the given line is [tex]\(-\frac{3}{2}\)[/tex].

2. Parallel lines have the same slope:

Therefore, the slope of the required line will also be [tex]\(-\frac{3}{2}\)[/tex].

3. Use the point-slope form of the equation of a line:

The point-slope form of a line is [tex]\( y - y_1 = m(x - x_1) \)[/tex],
where [tex]\((x_1, y_1)\)[/tex] is a point on the line and [tex]\(m\)[/tex] is the slope.

4. Substitute the given point [tex]\((-3,1)\)[/tex] and the slope [tex]\(-\frac{3}{2}\)[/tex] into the point-slope form:

[tex]\[ y - 1 = -\frac{3}{2}(x - (-3)) \][/tex]

Simplifying, we get:

[tex]\[ y - 1 = -\frac{3}{2}(x + 3) \][/tex]

This is the equation of the line in point-slope form.

Therefore, the correct answer is:
[tex]\[ y - 1 = -\frac{3}{2}(x + 3) \][/tex]