Mathematics
8 Online
OpenStudy (anonymous):
Given the points (2, 3) and (6, 8), write the point-slope form of the equation.
y - 3 = x - 2
y - 3 = 5/4 (x - 2)
y - 8 = 4/5 (x - 6)
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OpenStudy (anonymous):
i think its the second on ebut am not sure
OpenStudy (mathlegend):
First, find the slope.
OpenStudy (mathlegend):
y2-y1/x2-x1
OpenStudy (mathlegend):
Can you substitute in the values?
OpenStudy (anonymous):
5/4
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OpenStudy (mathlegend):
Good
OpenStudy (mathlegend):
Now use the point slope form formula.
y-y1=m(x-x1)
OpenStudy (anonymous):
whats the next step?
OpenStudy (mathlegend):
Plug in those values
OpenStudy (anonymous):
um y=mx+b so y=5/4x+b
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OpenStudy (mathlegend):
No.... just plug those values into the point slope form and what did you get?
OpenStudy (anonymous):
point slope form?
OpenStudy (mathlegend):
y-y1=m(x-x1)
OpenStudy (anonymous):
m=y-y1/x=x1?
OpenStudy (mathlegend):
y-y1=m(x-x1)
y-3=5/4(x-2)
All I did was substitute in things. Do you understand @EmmaH
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OpenStudy (anonymous):
you only used the first pair? o
OpenStudy (mathlegend):
Yes, because it is...
y-Y1=M(x-X1)
OpenStudy (mathlegend):
It does not ask for x2 and y2
OpenStudy (anonymous):
oh ok so y-3=5/4(x-2)
is the answer?
OpenStudy (mathlegend):
Yes, that is the point slope form.
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OpenStudy (anonymous):
ok thanks!=D