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The point (x,y) lies on the line with sl...

The point (x,y) lies on the line with slope m and passes through the fixed point `(x_(0),y_(0))` if and only if its coordinates satisfy the equation `y-y_(0)` is equal to

A

`m(x-x_(0))`

B

`m(y-x_(0))`

C

`m(y-x)`

D

`m(x-y_(0))`

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The correct Answer is:
To solve the problem, we need to derive the equation of a line that has a slope \( m \) and passes through a fixed point \( (x_0, y_0) \). ### Step-by-Step Solution: 1. **Understanding the Slope**: The slope \( m \) of a line is defined as the ratio of the change in \( y \) to the change in \( x \). Mathematically, this can be expressed as: \[ m = \frac{y - y_0}{x - x_0} \] where \( (x_0, y_0) \) is a point on the line and \( (x, y) \) is any other point on the line. **Hint**: Recall that the slope is the rise over run, which means how much \( y \) changes for a given change in \( x \). 2. **Rearranging the Equation**: We can rearrange the equation to isolate \( y - y_0 \): \[ y - y_0 = m(x - x_0) \] **Hint**: When rearranging equations, ensure you maintain equality by performing the same operation on both sides. 3. **Final Equation**: The equation \( y - y_0 = m(x - x_0) \) represents the line with slope \( m \) passing through the point \( (x_0, y_0) \). This is the point-slope form of the equation of a line. **Hint**: Recognize that this form is useful for writing the equation of a line when you know a point on the line and the slope. ### Conclusion: The coordinates \( (x, y) \) satisfy the equation: \[ y - y_0 = m(x - x_0) \] This means that any point \( (x, y) \) on the line will satisfy this equation.
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DISHA PUBLICATION-STRAIGHT LINES AND PAIR OF STRAIGHT LINES-EXERCISE 1: CONCEPT BUILDER
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