Posted by **Sam<3** on Sunday, October 18, 2009 at 10:01am.

Write an equation in point-slope form of the line that passes through the given points:

1. (5,-6), (1,-7)

2. (6,-3), (-1,9)

3. write an equation of a line that is perpendicular to y=-3x+5 and passes through (4,3).

- Algebra (grade 9) -
**Reiny**, Sunday, October 18, 2009 at 10:16am
for #1 and #2

first find the slope, that gives you the m.

Now pick one of the given points and sub those values into

y = mx + b

Solve for b and rewrite the equation.

I am sure that your teacher and/or your textbook has given you several examples of this type of fundamental question.

#3.

The line perpedicular to the given line must have slope of 1/3

so new equation:

y = (1/3)x + b

sub in (4,3)

3 = (1/3)(4) + b

I usually get rid of my fractions by multiplying by whatever the denominator is

9 = 4 + 3b

b = 5/3

final equation : y = (1/3)x + 5/3

## Answer This Question

## Related Questions

- math - i have more than one question so if u no any of the answers please tell ...
- geometry - I would love for someone to check my work on the seven problems that ...
- Algebra - 1.Tell whether the sequence is arithmetic. If it is, what is the ...
- Geometry - How do I write an equation of a line perpendicular to the graph of -...
- Algebra - 1.Write an equation in slope- intercept form of the line that passes ...
- algebra - Write an equation in slope-intercept form of the line that passes ...
- Algebra 1 - Write an equation in slope-intercept form for a line that passes ...
- algebra - write an equation in slope-intercept form of the line that passes ...
- algebra (check plz) - write an equation in slope-intercept form of the line that...
- Pre- Algebra - Given an equation of a line, how do I find equations for lines ...

More Related Questions