Brancru56 Brancru56
  • 14-01-2015
  • Mathematics
contestada

The line that passes through (1,5) and (4,-4). (Hint: Find the slope first.)

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Ananda26
Ananda26 Ananda26
  • 14-01-2015
The slope of a line is given by the equation [tex] y_{2} - y_{1} / x_{2} - x_{1} [/tex]

y2 is -4. y1 is 5
x2 is 4. x1 is 1

-4 -5 / 4-1 = -9/3 = -3
The slope is -3. Now we need to find the y-intercept

y= mx +b
5= -3(1) +b
5= -3 +b
b= 8
Our equation for the line: y= -3x +8
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