Reyes O'Quinn
06/10/2024 · Junior High School
A line passes through the point \( (7,10) \) and has a slope of \( \frac{2}{7} \). Write the equation of the line using \( x \) as the independent variable: \( y=\square \) Find the vertical intercept for this line:
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Step-by-step Solution
To find the equation of the line that passes through the point \( (7, 10) \) with a slope of \( \frac{2}{7} \), 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 \( (x_1, y_1) \) is a point on the line and \( m \) is the slope. Here, \( (x_1, y_1) = (7, 10) \) and \( m = \frac{2}{7} \).
Substituting these values into the point-slope form:
\[
y - 10 = \frac{2}{7}(x - 7)
\]
Now, we can simplify this equation to get it into slope-intercept form \( y = mx + b \).
First, distribute the slope on the right side:
\[
y - 10 = \frac{2}{7}x - \frac{2}{7} \cdot 7
\]
Calculating \( \frac{2}{7} \cdot 7 \):
\[
y - 10 = \frac{2}{7}x - 2
\]
Next, add 10 to both sides to isolate \( y \):
\[
y = \frac{2}{7}x - 2 + 10
\]
Simplifying the right side:
\[
y = \frac{2}{7}x + 8
\]
Thus, the equation of the line is:
\[
y = \frac{2}{7}x + 8
\]
Now, to find the vertical intercept (also known as the y-intercept), we can set \( x = 0 \) in the equation:
\[
y = \frac{2}{7}(0) + 8 = 8
\]
Therefore, the vertical intercept is:
\[
\text{Vertical intercept: } 8
\]
In summary, the equation of the line is:
\[
y = \frac{2}{7}x + 8
\]
And the vertical intercept is:
\[
8
\]
Quick Answer
The equation of the line is \( y = \frac{2}{7}x + 8 \). The vertical intercept is 8.
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