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sertanlavr [38]
3 years ago
14

Which equation represents the line that is perpendicular to y= 3/4x + 1 and passes through (-5, 11)

Mathematics
1 answer:
ArbitrLikvidat [17]3 years ago
6 0

The equation which represents the perpendicular line is y = -\frac{4}{3}  x  +  \frac{13}{3}  ⇒ A

Step-by-step explanation:

Let us revise the relation between the slopes of the perpendicular lines

  • The product of the slopes of the perpendicular lines is -1
  • That means if the slope of one of them is m, then the slope of the other is
  • reciprocal the slope of a line and change its sign to find the slope of the perpendicular line to it

The form of the linear equation is y = m x + b, where m is the slope of the line and b is the y-intercept (y at x = 0)

∵ The equation of the given line is y = \frac{3}{4} x + 1

- Compare it with form of the equation above

∴ m =  \frac{3}{4}  ⇒ slope of the given line

- To find the slope of the perpendicular line reciprocal it and

  change its sign

∴ The slope of the perpendicular line = -\frac{4}{3}

Let us write the equation of the perpendicular line

∵ y = m x + b

∴ y =  -\frac{4}{3} x + b

- To find b substitute x and y in the equation by the coordinates

  of a point on the line

∵ The perpendicular line passes through the point (-5 , 11)

∴ x = -5 and y = 11

- Substitute it in the equation

∴ 11 =   -\frac{4}{3} (-5) + b

∴ 11 = \frac{20}{3} + b

- Subtract  \frac{20}{3}  from both sides

∴ \frac{13}{3} = b

∴ y =  -\frac{4}{3}  x  +  \frac{13}{3}

The equation which represents the perpendicular line is

y = -\frac{4}{3}  x  +  \frac{13}{3}

Learn more:

You can learn ore about the perpendicular lines in brainly.com/question/2601054

#LearnwithBrainly

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