TSI Math: Plugging in Slope and Point to Find the Equation of a Line
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A line passes through the point (-4, -4) and has a slope of . What is its equation?
Elementary Algebra and Functions | Linear Equations, Inequalities, and Systems |
Mathematics and Statistics Assessment | Linear Equations, Inequalities, and Systems |
Product Type | TSI |
TSI | Mathematics and Statistics Assessment TSI Math TSI Mathematics |
TSI Math | Elementary Algebra and Functions |
TSI Mathematics | Elementary Algebra and Functions |
Test Prep | TSI |
Transcript
we tattooed on our arm but y equals mx plus
b is you know kind of primary formula for the
slope of a line We got a few other issues
We have to figure out here So let's think through
this here So we have everything we need though a
point and a slope So we know we can calculate
the line All right Well the equation of a line
is determined using a point on the line Let's call
that x one y one and its slope by using
the point slope equation Why minus y one equals the
slope Tens quantity x minus x one Well for this
problem we've got m equals negative three force and think
about that means it's going to be a line sloping
downward look kind of like that And it's uh three
force not a very big slope So it's not super
steve but it's kind of okay And then we got
the point here X one Why One is negative for
negative For they gave that to us So now we
could just kind of plug in chug let's put in
all the numbers we got Why minus why once we
get why minus that negative for there and that equals
will the slow that negative three fourth times the quantity
x minus x one and x one is that negative
forthe right simplify things without y plus four equals negative
three four times quantity expose for and if we seem
fight again that's negative three Acts over 4 minus 3
only subtract four from both sides to find an equation
in the you know normal slope intercept form there that
gets us Why equals negative three force x minus seven
and that's it The equation of line is why equals
negative three four sacks minus seven Answer B b bye