Saturday

November 22, 2014

November 22, 2014

Posted by **Rick** on Sunday, February 19, 2012 at 5:10pm.

Through (2, −3) and (1, 1)

Which formula do I use?

y2-y1/x2-x1 or y-y1=m(x-x1)[<--if i use this how do i plug in the numbers?]

Thank you.

- Algebra -
**MathGuru**, Sunday, February 19, 2012 at 6:35pmUse both formulas.

m = (y2 - y1)/(x2 - x1)

= [1 - (-3)]/(1 - 2)

= (1 + 3)/(1 - 2)

= 4/-1 or -1/4

Substitute the first ordered pair into the second formula:

y - (-3) = -1/4(x - 2)

y + 3 = -1/4x + 2/4

y = -1/4x + 2/4 - 3

y = -1/4x - 10/4

This equation is in the form: y = mx+b

I hope this helps.

**Answer this Question**

**Related Questions**

Math - Find a linear equation whose graph is the straight line with the given ...

Math - Find a linear equation whose graph is the straight line with the given ...

Math/Algebra - Please help me with this, below is a question I have to answer…...

math calculus - Find the equation of the function f whose graph passes through ...

Math-due today, need a check - Please help me with this, below is a question I ...

Algebra... - Write the equation of a vertical line passing through the point (8...

Mathamatics - This question concerns the straight line that passes through the ...

Math - This question concerns the straight line that passes through the points...

Calc - let f be the function whose graph goes through the point (3,6) whose ...

Algebra - Need help with two questions. I've been stuck on them for a while now...