Marshall Hill
02/25/2023 · Middle School
Find an equation of the line having the given slope and containing the given point. Slope \( \frac{3}{4} \); through \( (-4,4) \)
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Tutor-Verified Answer
Step-by-step Solution
To find the equation of a line given a slope and a point, we can use the point-slope form of the equation of a line, which is:
\[
y - y_1 = m(x - x_1)
\]
where \( m \) is the slope, and \( (x_1, y_1) \) is the point the line passes through.
Given:
- Slope \( m = \frac{3}{4} \)
- Point \( (x_1, y_1) = (-4, 4) \)
Substituting these values into the point-slope form:
\[
y - 4 = \frac{3}{4}(x - (-4))
\]
This simplifies to:
\[
y - 4 = \frac{3}{4}(x + 4)
\]
Next, we can distribute the slope on the right side:
\[
y - 4 = \frac{3}{4}x + \frac{3}{4} \cdot 4
\]
Calculating \( \frac{3}{4} \cdot 4 \):
\[
\frac{3}{4} \cdot 4 = 3
\]
So the equation becomes:
\[
y - 4 = \frac{3}{4}x + 3
\]
Now, add 4 to both sides to solve for \( y \):
\[
y = \frac{3}{4}x + 3 + 4
\]
This simplifies to:
\[
y = \frac{3}{4}x + 7
\]
Thus, the equation of the line in slope-intercept form is:
\[
\boxed{y = \frac{3}{4}x + 7}
\]
Quick Answer
The equation of the line is \( y = \frac{3}{4}x + 7 \).
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