Friday

January 30, 2015

January 30, 2015

Posted by **trixie** on Thursday, September 3, 2009 at 6:32pm.

find the equation for the line with undefined slope and passing through the point (-1,-2). what do i need to start that off?

what equation do i use to find the slope-intercept?

whats the point-slope form?

- algebra review! -
**Reiny**, Thursday, September 3, 2009 at 8:38pmany vertical line has an undefined slope and always has the form x = c, where c is a constant.

All you need is a point, then simply state it as x = 'the x of the given point'

so for your first one : x = 7

for the second x = -1

slope-intercept form looks like this

y = mx + b, where m is the slope and b is the y-intercept

e.g. y = 4x + 9

the slope is 4 and the y-intercept is 9

the point-slope form is one of the best ways to find the equation of a straight line, given the slope and a point

e.g. given the point (5,-3) and slope of 2/3, find the equation

y - (-3) = (2/3)(x - 5)

3(y+3) = 2(x-5)

3y + 3 = 2x - 10

you can now re-arrange it to end up with any version they ask for.

- algebra review! -
**Reiny**, Thursday, September 3, 2009 at 8:43pmmy last line should have been

3y + 9 = 2x - 10

**Answer this Question**

**Related Questions**

math - i have more than one question so if u no any of the answers please tell ...

algebra - Write the equation of the line that passes through point (5, 4) with a...

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

Algebra II - Can you make sure my Algebra II work is correct? I've done the ...

math (please help) - 1. Write the equation for the horizontal line that contains...

math - I have a few question so I will number them off. Please answer them for ...

Algebra (grade 9) - Write an equation in point-slope form of the line that ...

Math - Write the slope-intercept form of an equation of the line that passes ...

Algebra: please check - Find the equation of a line that passes through the ...

Math- finding equation - Can someone explain to me how to find the equation pf ...