Posted by **margie** on Wednesday, November 1, 2006 at 5:21pm.

Can you please give me one of them so I cansolve for the other one?PLease!

The general formula for a straight line is y = mx + b.

Just plug the points into the equation to arrive at two equations.

6=2m+b

10=4m+b

you have two equations and two unknowns. Solve them simultaneously to obtain an answer for b

**Multiply the first equation by -2. Leave the other one as is.
**

-12=-4m-2b

10=4m+b

=============

Now add the two equations

-2 = 0m -b or

-2 = -b

and b = 2

Check my arithmetic. Now plug b into one of the equations to solve for m, then plug those two values into your original equation to see if it is satisfied. If so, then 2 is the answer you need.
It would be helpful, and get you quicker answers, if you put the SUBJECT (in this case

**math**) in the SUBJECT line.

Thanks.

=)

What would be the missing piece of information given the following information:

Find the equation of the line that passes through the points (2, 6) and (4, 10).

y = 2x + ?

4

2

7

5

The general formula for a straight line is y = mx + b.

Just plug the points into the equation to arrive at two equations.

6=2m+b

10=4m+b

you have two equations and two unknowns. Solve them simultaneously to obtain an answer for b

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