Find the equation of a line in point - slope form that goes through the points (4, -4) and (3, -6).
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- Find the equation of a line in point - slope form that goes through the points (4, -4) and (3, -6).
- A line that goes through the points (4, - 4) and (3, - 6).
- The equation of line using point - slope form.
1. The slope of line joining the points (a, b) and (c, d) is
2. Equation of line having slope 'm' and which passes through the point (a, b) is given by
Given that,
- A line that goes through the points (4, - 4) and (3, - 6).
So,
- Slope of line (m) is evaluated as
Now,
- The equation of line having slope 2 and which passes through the point (4, - 4) is given
Additional Information
Different forms of equations of a straight line
1. Equations of horizontal and vertical lines
- Equation of the lines which are horizontal or parallel to the X-axis is y = a, where a is the y – coordinate of the points on the line.
- Similarly, equation of a straight line which is vertical or parallel to Y-axis is x = a, where a is the x-coordinate of the points on the line.
2. Point-slope form equation of line.
- Consider a non-vertical line L whose slope is m, A(x,y) be an arbitrary point on the line and P(a, b) be the fixed point on the same line. Equation of line is given by y - b = m(x - a)
3. Slope-intercept form equation of line.
- Consider a line whose slope is m which cuts the Y-axis at a distance ‘a’ from the origin. Then the distance a is called the y– intercept of the line. The point at which the line cuts y-axis will be (0,a). Then equation of line is given by y = mx + a.
4. Intercept Form of Line.
- Consider a line L having x– intercept a and y– intercept b, then the line passes through X– axis at (a,0) and Y– axis at (0,b). Equation of line is given by x/a + y/b = 1.
5. Normal form of Line.
- Consider a perpendicular from the origin having length p to line L and it makes an angle β with the positive X-axis. Then, the equation of line is given by x cosβ + y sinβ = p.
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