Monday

September 22, 2014

September 22, 2014

Posted by **kaitlyn** on Thursday, October 31, 2013 at 11:38am.

2. What is an equation for the line that passes through points (-1, -4) and (1, 4)? Write the equation in slope-intersect form.

3. Write an equation for the vertical line that contains point E(10, -3).

- math (please help) -
**Jai**, Thursday, October 31, 2013 at 12:07pm#1.

Note that horizontal line has a zero slope, and in the form y = c, where c is a any real number.

Therefore, if it passes thru the point (-8,8), the equation must be y = 8.

#2.

If we are given the two points on the line, we first get the slope using the formula

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

where (x1,y1) and (x2,y2) are points on the line. Substituting,

m = (4 - (-4)) / (1 - (-1))

m = (4+4)/(1+1)

m = 4

Then we substitute it on the point slope formula:

y - y1 = m(x - x1)

Substituting,

y - 4 = 4(x - 1)

y = 4x - 4 + 4

y = 4x

#3.

Note that vertical line has a slope equal to infinity, and in the form x = c, where c is a any real number.

Therefore, if it passes thru the point (10,-3), the equation must be x = 10.

Hope this helps :3

- math (please help) -
**kaitlyn**, Thursday, October 31, 2013 at 12:18pmThank You so much Jai

**Answer this Question**

**Related Questions**

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

geo - A line contains the points (8, 9) and (–12, –7). Using point-slope form, ...

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

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

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

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

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

mat 101 - Equation for a line that passes through (6,26) and has a slope of 3 ...

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

math - 1.Write an equation for the line that is parallel to x = -35 and passes ...