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Write the equation of each line

2. Point = (-9,3) Slope = - 2/3

4. With y-intercept = -3 and parallel to y = 5x - 2

5. With y-intercept = 9 and perpendicular to y = 1/2x + 1

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User Jimm
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1 Answer

4 votes

Answer: Point-slope form equation:

Using the point-slope form equation, which is y - y₁ = m(x - x₁), where (x₁, y₁) is the given point and m is the slope, we can substitute the given values to find the equation.

Point = (-9, 3)

Slope = -2/3

Using the point-slope form equation:

y - 3 = (-2/3)(x - (-9))

Simplifying:

y - 3 = (-2/3)(x + 9)

Expanding:

y - 3 = (-2/3)x - 6

Rearranging:

y = (-2/3)x - 3

Therefore, the equation of the line is y = (-2/3)x - 3.

Parallel to y = 5x - 2:

The parallel line will have the same slope (5) as the given line because parallel lines have the same slope. The y-intercept is given as -3.

Using the slope-intercept form equation, which is y = mx + b, where m is the slope and b is the y-intercept, we can substitute the given values to find the equation.

Slope = 5

Y-intercept = -3

Therefore, the equation of the line is y = 5x - 3.

Perpendicular to y = (1/2)x + 1:

To find the perpendicular line, we need to take the negative reciprocal of the slope (1/2). The negative reciprocal of a number is obtained by flipping the fraction and changing the sign.

The given line has a slope of 1/2, so the perpendicular line will have a slope of -2 (negative reciprocal of 1/2). The y-intercept is given as 9.

Using the slope-intercept form equation, which is y = mx + b, where m is the slope and b is the y-intercept, we can substitute the given values to find the equation.

Slope = -2

Y-intercept = 9

Therefore, the equation of the line is y = -2x + 9.

answered
User Julien Ruffin
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