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Write the equation of a line that contains (1,5) and (-5,8)

1 Answer

6 votes

Answer: y =
-(1)/(2)x +
(11)/(2)

Explanation:

First, we will use the slope formula to find the slope.


\displaystyle (y_(2) -y_(1) )/(x_(2) -x_(1) ) =(8-5)/(-5-1) =(3)/(-6) =-(1)/(2)

Next, we will substitute this slope with one of the coordinate points. Then, we will simplify and solve for b to create a slope-intercept form equation by finding the y-intercept.

y = mx + b

y =
-(1)/(2)x + b

5 =
-(1)/(2)(1) + b

5 =
-(1)/(2) + b

5 +
(1)/(2) = b

b =
(11)/(2)

Lastly, we will substitute this into the equation.

y = mx + b

y =
-(1)/(2)x +
(11)/(2)

I have attached a graph of the given points and the equation we created.

Write the equation of a line that contains (1,5) and (-5,8)-example-1
User Iavr
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