Question 1205256
.


See the lesson

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/word/geometry/Find-the-slope-of--a-straight-line-passing-through-two-given-points.lesson>Find the slope of a straight line in a coordinate plane passing through two given points</A>

in this site.


It teaches on how to solve such problems.
From this lesson, &nbsp;learn the subject once and for all.


As a bonus for you, &nbsp;consider other closely related lessons in this site

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/word/geometry/Find-the-slope-of--a-straight-line-passing-through-two-given-points.lesson>Find the slope of a straight line in a coordinate plane passing through two given points</A>

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/word/geometry/Equation-for--a-straight-line-having-a-given-slope-and-passing-through-a-given-point.lesson>Equation for a straight line having a given slope and passing through a given point</A>

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/word/geometry/Solving-problems-related-to-the-slope-of-a-straight-line.lesson>Solving problems related to the slope of a straight line</A>

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/word/geometry/Equation-for--a-straight-line-passing-through-two-given-points.lesson>Equation for a straight line in a coordinate plane passing through two given points</A>

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/word/geometry/Equation-for--a-straight-line-parallel-to-a-given-line-and-passing-through-a-given-point.lesson>Equation for a straight line parallel to a given line and passing through a given point</A>

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/word/geometry/Equation-for--a-straight-line-perpendicular-to-a-given-line-and-passing-through-a-given-point.lesson>Equation for a straight line perpendicular to a given line and passing through a given point</A> 


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I'd like to make a comment to the post by @greenestamps.


It is normal process of learning, when millions of students make thousands of errors, when they learn a new subject.
There is nothing catastrophic in it.


A real catastrophe is when they learn NOTHING from their exercises.


Using formulas, making substitutions into formulas and making calculations this way is the most basic skill,
which normal student should master in the school (elementary school, middle school and high school).


Using formulas is the language of Math and many other disciplines, and it should be the same routine 
as to print using keyboard, to write using pen/pencil and paper, to speak using English, to fasten a button on a shirt etc.


If a student does not master it in his or her school years, then it is better for him/(for her)
to become a music composer, or a singer, or work at a restaurant, or in health-care, or be a house-wife, or a writer, 
or an artist painting walls, or in HOLLYWOOD, but not an engineer, not a designer, not a scientist, 
not a researcher, not an IT specialist, even not an accountant, and so on.


In simple and short words: if you develop your mathematical skills enough,
then the professions of the XXI century will be open to you.
If not, then your profession will be of the XX century.


Notice that I do not persuade and don not try to convince - I simply explain how it works in real life.


THEREFORE, my advise is THIS : do not afraid to make thousand or million errors, while you study in school.
Be afraid to learn nothing from it. &nbsp;&nbsp;&nbsp;&nbsp;It is the &nbsp;ONLY &nbsp;thing to be afraid.