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Snowcat [4.5K]
3 years ago
9

Write an equation of the line passing through each of the following pairs of points.

Mathematics
2 answers:
mr Goodwill [35]3 years ago
4 0

Answer:

y= 11/13x + 36/13

Step-by-step explanation:

y=mx+b

y2 -y1         -4-7 = -11

x1-x2           -8-5= -13

slope is 11/13

vampirchik [111]3 years ago
3 0

Answer:

y = \frac{11}{13} x + \frac{36}{13}

Step-by-step explanation:

First, find the slope of the line passing through the points

Then find the y-intercept of the line

Then construct the formula

1. find the slope

remember the formula

\frac{y_{2} -y_{1} }{x_{2} -x_{1} } is used to find the slope

now plug in the given points

(5, 7)

(-8, -4)

x_{1} = 5\\y_{1} = 7\\x_{2} = -8 \\y_{2} = -4

\frac{(-4) - (7)}{(-8) - (5)}

simplify and solve

= \frac{-11}{-13}

= \frac{11}{13}

2. find the y-intercept

remember the base formula for a line

y= mx + b

where m is the slope and b is the y-intercept

we know the slope, so now plug in one of the given coordinates for a point on the line and slove to find the y-intercept

y = mx + b

y = \frac{11}{13}x + b

use the first set of given coordinates for a point on this line: (5, 7)

7 = \frac{11}{13}  * 5 + b

solve by inverse operations and simplifying

7 = \frac{55}{13} + b

\frac{36}{13} = b

3. construct the formula

now we know the slope and the y-intercept, all we have to do now is substitute it into the base formula for a line:

y = mx + b

where m is the slope and B is the y-intercept

we found that

m = \frac{11}{13}

and

b = \frac{36}{13}

so that means the equation is

y = \frac{11}{13} * x + \frac{36}{13}

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