Colon Fernandez
01/16/2024 · Primary School
Find an equation of the line through \( (4,8) \) and parallel to \( y=3 x+6 \). \( y=\square \) (Type your answer in slope-intercept form.)
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Step-by-step Solution
To find the equation of a line that is parallel to the line given by \( y = 3x + 6 \) and passes through the point \( (4, 8) \), we first note that parallel lines have the same slope.
The slope of the line \( y = 3x + 6 \) is \( 3 \). Therefore, the slope of the line we want to find is also \( 3 \).
We can use the point-slope form of the equation of a line, which is given by:
\[
y - y_1 = m(x - x_1)
\]
where \( m \) is the slope and \( (x_1, y_1) \) is a point on the line. Here, \( m = 3 \) and \( (x_1, y_1) = (4, 8) \).
Substituting these values into the point-slope form:
\[
y - 8 = 3(x - 4)
\]
Now, we simplify this equation:
\[
y - 8 = 3x - 12
\]
Adding \( 8 \) to both sides gives:
\[
y = 3x - 12 + 8
\]
\[
y = 3x - 4
\]
Thus, the equation of the line in slope-intercept form is:
\[
y = 3x - 4
\]
So the final answer is:
\[
y = 3x - 4
\]
Quick Answer
\( y = 3x - 4 \)
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