Select all the pairs of points that have lines passing through them with a slope of 2/3.
Understand the Problem
The question is asking us to determine which pairs of points have lines passing through them with a specific slope of 2/3. To solve this, we will calculate the slope between each given pair of points using the slope formula and see which ones match the specified slope.
Answer
The pairs of points are (0, 0) and (3, 2) and (-2, -2) and (4, 2).
Answer for screen readers
The pairs of points that have lines passing through them with a slope of ( \frac{2}{3} ) are:
- (0, 0) and (3, 2)
- (-2, -2) and (4, 2)
Steps to Solve
- Slope Formula Introduction
To determine if the pairs of points have a slope of ( \frac{2}{3} ), we'll use the slope formula: $$ m = \frac{y_2 - y_1}{x_2 - x_1} $$ where ( (x_1, y_1) ) and ( (x_2, y_2) ) are the coordinates of the two points.
- Calculate Slope for Each Pair
We'll calculate the slope for each pair of points.
Pair 1: (0, 0) and (2, 3)
$$ m = \frac{3 - 0}{2 - 0} = \frac{3}{2} $$
Pair 2: (0, 0) and (3, 2)
$$ m = \frac{2 - 0}{3 - 0} = \frac{2}{3} $$
Pair 3: (1, 5) and (4, 2)
$$ m = \frac{2 - 5}{4 - 1} = \frac{-3}{3} = -1 $$
Pair 4: (-2, -2) and (4, 2)
$$ m = \frac{2 - (-2)}{4 - (-2)} = \frac{4}{6} = \frac{2}{3} $$
Pair 5: (20, 30) and (-20, -30)
$$ m = \frac{-30 - 30}{-20 - 20} = \frac{-60}{-40} = \frac{3}{2} $$
- Identify Matching Slopes
Now, we check which slopes equal ( \frac{2}{3} ):
- Pair 1: ( \frac{3}{2} )
- Pair 2: ( \frac{2}{3} ) (Match)
- Pair 3: ( -1 )
- Pair 4: ( \frac{2}{3} ) (Match)
- Pair 5: ( \frac{3}{2} )
The pairs of points that have lines passing through them with a slope of ( \frac{2}{3} ) are:
- (0, 0) and (3, 2)
- (-2, -2) and (4, 2)
More Information
The slope indicates the steepness of a line. A slope of ( \frac{2}{3} ) means for every 2 units the line rises, it runs 3 units horizontally.
Tips
Common mistakes include:
- Not applying the slope formula correctly or using the wrong points.
- Failing to simplify fractions when calculating slopes.
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