Math Problem Statement
Reflect the point -2,2 over the line 3/4 x plus 3
Solution
To reflect the point over the line , we'll follow these steps:
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Find the slope of the perpendicular line:
The slope of the given line is .
The slope of the line perpendicular to it is the negative reciprocal, which is . -
Write the equation of the perpendicular line:
The equation of the perpendicular line passing through the point will be in the form , where is the slope and is the point.
So, we substitute: Simplify the equation to get the equation of the perpendicular line: -
Find the intersection of the two lines:
Now, we solve the system of equations to find the intersection of the line and the perpendicular line .Set the equations equal to each other: Multiply through by 12 to eliminate the fractions: Combine like terms: So, .
-
Find the corresponding y-coordinate:
Substitute into the equation of the original line : So, the point of intersection is . -
Find the reflected point:
The point and its reflection will be equidistant from the line. Using the formula for reflection, the reflected point will be .
The reflection of the point over the line is approximately .
Would you like further details or clarification on any step?
Here are 5 related questions to consider:
- How do you find the equation of a line given two points?
- What is the geometric meaning of a line's slope?
- How would the process change if the reflection line was vertical or horizontal?
- How can you verify if two lines are perpendicular?
- What is the formula for the distance between a point and a line?
Tip: Always verify by checking if the midpoint between the original and reflected point lies on the reflection line!
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Math Problem Analysis
Mathematical Concepts
Geometry
Linear Equations
Reflections
Coordinate Geometry
Formulas
y = mx + b (Equation of a line)
Slope formula: m = -1/(slope of given line) for perpendicular lines
Reflection formula: Reflection of a point across a line
Theorems
Slope-intercept form of a line
Perpendicular slope theorem
Equidistant reflection property
Suitable Grade Level
Grades 9-11