Q. Find the slope of the line y= 3/4 x+14
Answer
The equation is in slope–intercept form \(y = mx + b\), so the slope \(m = \frac{3}{4}\). Final result: \(\frac{3}{4}\).
Detailed Explanation
Problem: Find the slope of the line \(y = \tfrac{3}{4}x + 14\).
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Recall the slope-intercept form.
The slope-intercept form of a line is \(y = mx + b\), where \(m\) is the slope and \(b\) is the y-intercept.
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Compare the given equation to the form.
The given equation is \(y = \tfrac{3}{4}x + 14\). In this form, the coefficient multiplying \(x\) corresponds to \(m\), the slope.
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Identify the slope.
Comparing term-by-term, the coefficient of \(x\) is \(\tfrac{3}{4}\), so the slope is \(m = \tfrac{3}{4}\).
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Interpretation (optional).
The slope \(\tfrac{3}{4}\) means that for every 4 units you move to the right along the x-axis, the line rises 3 units (rise/run = 3/4). In decimal form the slope is \(0.75\).
Answer: The slope is \(\tfrac{3}{4}\).
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FAQs
What is the slope of the line \(y=\tfrac{3}{4}x+14\)?
The slope is \(m=\tfrac{3}{4}\).
What is the y-intercept?
The y-intercept is \(b=14\), which gives the point \((0,14)\).
What is the x-intercept?
Set \(y=0\): \(0=\tfrac{3}{4}x+14\) so \(x=-\tfrac{56}{3}\). The x-intercept is \(\left(-\tfrac{56}{3},0\right)\).
What is the equation of a line parallel to this one?
Parallel lines share slope \(m=\tfrac{3}{4}\). General form: \(y=\tfrac{3}{4}x+c\). Example through origin: \(y=\tfrac{3}{4}x\).
What is the slope of a line perpendicular to this one?
Perpendicular slope is the negative reciprocal: \(-\tfrac{4}{3}\). Example: \(y=-\tfrac{4}{3}x\).
How do I write this line in standard form?
Multiply by 4: \(4y=3x+56\). Rearranged: \(3x-4y=-56\) (or \(3x-4y+56=0\)).
How to graph it quickly?
Start at \((0,14)\). Use slope rise/run \(3\) up, \(4\) right to plot another point, then draw the line through them.
How to express it in point-slope form?
Using \((0,14)\): \(y-14=\tfrac{3}{4}(x-0)\).
How to find the slope from two points on the line?
Pick \((0,14)\) and \((4,17)\). Slope \(m=(17-14)/(4-0)=3/4\).
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Math, Calculus, Geometry, etc.
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