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What is the equation of a line that contains the point [tex]\((2, -5)\)[/tex] and is parallel to the line [tex]\(y = 3x - 4\)[/tex]?

A. [tex]\(y = 3x - 4\)[/tex]

B. [tex]\(y = -\frac{1}{3}x - \frac{13}{3}\)[/tex]

C. [tex]\(y = 3x - 11\)[/tex]

D. [tex]\(y = -\frac{1}{3}x - 4\)[/tex]


Sagot :

To find the equation of a line that contains the point [tex]\((2, -5)\)[/tex] and is parallel to the line [tex]\(y = 3x - 4\)[/tex], follow these steps:

1. Identify the slope of the parallel line:
Since the line is parallel to [tex]\(y = 3x - 4\)[/tex], it will have the same slope. The slope of this line is [tex]\(3\)[/tex].

2. Formulate the equation of the new line:
The general equation of a line in slope-intercept form is [tex]\(y = mx + b\)[/tex], where [tex]\(m\)[/tex] is the slope and [tex]\(b\)[/tex] is the y-intercept.

3. Use the given point to find the y-intercept ([tex]\(b\)[/tex]):
Plug in the coordinates of the given point [tex]\((2, -5)\)[/tex] into the slope-intercept form, [tex]\(y = mx + b\)[/tex].

[tex]\[ -5 = 3 \cdot 2 + b \][/tex]

4. Solve for [tex]\(b\)[/tex]:

[tex]\[ -5 = 6 + b \][/tex]
[tex]\[ b = -5 - 6 \][/tex]
[tex]\[ b = -11 \][/tex]

5. Write the final equation:
Now we have the slope [tex]\(m = 3\)[/tex] and the y-intercept [tex]\(b = -11\)[/tex]. Therefore, the equation of the line is:

[tex]\[ y = 3x - 11 \][/tex]

Therefore, the correct equation of the line that contains the point [tex]\((2, -5)\)[/tex] and is parallel to the line [tex]\(y = 3x - 4\)[/tex] is:
[tex]\[ y = 3x - 11 \][/tex]
The answer is:
C. [tex]\(y = 3x - 11\)[/tex]