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inessss [21]
3 years ago
5

Write the point-slope form of the equation of the line that passes through the points (-3, 5) and (-1, 4). Include your work in

your final answer. Type your answer in the box provided or use the upload option to submit your solution.
Mathematics
2 answers:
maw [93]3 years ago
8 0
Firstly, we need to understand the formula of point-slope form:
y1 - y2 =m( x1 - x2)

Where x and y is the coordinates and m is the slope respectively.

To find the slope:
\frac{y1 - y2}{x1 - x2}
In this case:
\frac{5 - 4}{ - 3 - ( - 1)}  \\  =  \frac{1}{ - 3 + 1}  \\  =  -  \frac{1}{2}

We can then put the above slope and the point (-1,4) into the formula:

4-y = -1/2(-1-x)
-y = 1/2+1/2x-4
y = -1/2x+7/2

Alternatively:

y-4=-1/2(x-(-1))
y=-1/2x-1/2+4
y = -1/2x+7/2

Therefore the answer is y = -1/2x+7/2.

Hope it helps!
lidiya [134]3 years ago
6 0

<u>answer:</u>  y = -\frac{1}{2}x + \frac{7}{2}  

<u>work/explanation: </u>

point slope formula ==> y - y_{1} = m(x - x_{1})  | plug the points

slope formula ==> m =\frac{y_{2} - y_{1}}{x_{2}-x_{1}} | for slope or m

--------------------------------------------------------------

first you find the slope of the lines.

m =\frac{4-5}{-1-3 } = -\frac{1}{2}  <== slope or m for the equation

--------------------------------------------------------------

plug the points and slope into the point-slope formula.

y - 4 = -\frac{1}{2} (x - -3)


solve the equation until the answer is y =mx + b form.

y - 4 = -\frac{1}{2} (x + 3)  | multiply -1/2 into the parentheses

y -4 = -\frac{1}{2}x - \frac{1}{2}  | add the 4, move it over to -1/2

y = -\frac{1}{2}x + \frac{7}{2}  | final answer :)

--------------------------------------------------------------

hope this helps! i'm sorry i took a while to answer ❤ from peachimin

<em>EDIT: i put in the correct numbers</em>




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