Which of the following is an equation of the line that passes through the point (1, 1) and has a slope of 2?
A.
y = 2x – 1
B.
y = 2x + 1
C.
y = –2x – 1
D.
y = –2x + 1
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OpenStudy (zzr0ck3r):
we want the form y = mx+b
m = slope = 2
y = 2x+b
we need to find b and we are done
use the point (1,1)
so
x = 1, y = 1
y = 2x+ b becomes 1 = 2(1) + b
b = -1
so
what is the answer?
OpenStudy (zale101):
Start with the slope formula.
OpenStudy (anonymous):
B
OpenStudy (zzr0ck3r):
y = 2x+ b
b = -1
what is the answer?
OpenStudy (anonymous):
C
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OpenStudy (zzr0ck3r):
put -1 where you see b in the following equation
y=2x+b
and then type me what you have
OpenStudy (anonymous):
TO TIRED TO HINK ....
OpenStudy (anonymous):
THATS not a option
OpenStudy (zzr0ck3r):
y=2x+b
^put -1 there
OpenStudy (anonymous):
y=2x+-1
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OpenStudy (zzr0ck3r):
ok what is x+(-1)?
OpenStudy (zzr0ck3r):
2x-1 is the answer
OpenStudy (zzr0ck3r):
gl
OpenStudy (anonymous):
Actually we dont need any fromula here just plug the x any y in equation and voila!