anonymous
  • anonymous
Write an equation for the line in point-slope and slope-intercept forms. 4) Passes through (1, 2) and has a slope of 7. Plz help can someone plz show me how to do this??????!!!!!!
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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Zale101
  • Zale101
\[m=\frac{ y-y _{1} }{ x-x _{1} }\]
Zale101
  • Zale101
use this formula
Zale101
  • Zale101
in which m is the slope and the values of \[x_{1}\] and \[y_{1}\] come from the x and y values of the point you were given.

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Zale101
  • Zale101
Can u Substitute those values
anonymous
  • anonymous
wait substitute them how?
Zale101
  • Zale101
plug in to the equations
anonymous
  • anonymous
but I only have one x and y
Zale101
  • Zale101
m is 7 x is 1 y is 2
anonymous
  • anonymous
ok so can my other point be (2,18)?
Zale101
  • Zale101
now plug in these numbers to the formula i showed u above
Zale101
  • Zale101
Another way you can do it is to use the slope-intercept form of an equation.
Zale101
  • Zale101
y=mx+b
anonymous
  • anonymous
ok so what's my answer?
Zale101
  • Zale101
y=mx+b where m is the slope of the line b is the value where the graph crosses the y axis. we already know that 7 is our slope so y=7x+b
Zale101
  • Zale101
Substitute x = -1 and y = -2 values into the slope intercept form.
Zale101
  • Zale101
can u do this?
Zale101
  • Zale101
i will do it for u 2=7*1+b
Zale101
  • Zale101
understood?
anonymous
  • anonymous
so my equation for the line in point slope, and slope intercept forms that passes through (1,2) and has a slope of 7 is 2=7*1+b?
Zale101
  • Zale101
correct

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