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gulaghasi [49]
3 years ago
10

Write an equation of the line passing through each of the following pairs of points. a (−10, 4), (2, −5)

Mathematics
1 answer:
rusak2 [61]3 years ago
8 0

Answer:

see explanation

Step-by-step explanation:

The equation of a line in slope- intercept form is

y = mx + c ( m is the slope and c the y- intercept )

Calculate m using the slope formula

m = (y₂ - y₁ ) / (x₂ - x₁ )

with (x₁, y₁ ) = (- 10, 4) and (x₂, y₂ ) = (2, - 5)

m = \frac{-5-4}{2+10} = \frac{-9}{12} = - \frac{3}{4}, thus

y = - \frac{3}{4} x + c ← is the partial equation of the line

To find c substitute either of the 2 given points into the partial equation

Using (2, - 5), then

- 5 = - \frac{3}{2} + c ⇒ c = - 5 + \frac{3}{2} = - \frac{7}{2}

y = - \frac{3}{4} x - \frac{7}{2} ← equation of line

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