Thursday

December 18, 2014

December 18, 2014

Posted by **Jacinta** on Friday, June 26, 2009 at 10:27am.

This is what I got. Is this correct?

y = –3x + 10

- Algebra -
**Anonymous**, Friday, June 26, 2009 at 10:39amYes!

- Algebra -
**Jacinta**, Friday, June 26, 2009 at 10:53amIs my evvaluation correct?

y=mx+b

3x + y = 5

y = -3x+5

y = -2

m = -3

x = 4

b = unknown

Solve For b:

y = -3x + b

-2 = -3(4) + b

-2 = -12 + b

-12 + 10 = -2

10=b

To Check:

y = -3x + b

-2 = -3(4) + b

-2 = -12 + b

-12+10 = b

10 = b

-2 = -3(4) + b

-2 = -12 + 10

-12+10 = -2

b = 10

- Algebra -
**Reiny**, Friday, June 26, 2009 at 12:08pmA real easy way to do this question is to realize that since they have the same slope, the equations must differ only in the constant.

So let the new equation be

3x + y = c

plug in the point (4,-2)

12 - 2 = c = 10

so your equation is 3x + y = 10

[ BTW, had it asked for a perpendicular line then my opening new equation would have been

x + 3y = c

(notice the slopes would be opposite reciprocals) ]

- Algebra -
**Jacinta**, Friday, June 26, 2009 at 1:08pmSo my work is correct? Thanks for the help!

**Answer this Question**

**Related Questions**

advanced algebra 2 - Find an equation for the line with the given properties: 1...

Math - I had an assignment containing 45 problems, and I am unsure of 4, can you...

Math - I had an assignment containing 45 problems, and I am unsure of 4, can you...

MATH - I had an assignment containing 45 problems, and I am unsure of 4, can you...

Algebra - graph the equation x-3=y (where do I plot the points?) find the ...

Algebra - Find the equation of the line parallel to the line 3x + y = 5 and ...

Algebra - Find the equation of the line parallel to the line 3x + y = 5 and ...

Algebra - Find the equation of the line parallel to the line 3x + y = 5 and ...

colledge algebra - Find the slope‐intercept equation of the line with the ...

Algebra - I did this problem, but would like to compare answers please if ...