# math help & correction

posted by .

Problem #1
Is this correct or wrong?
Find the slope of the line passing through the points(-1, -1)and(-1, 2). Write the equation of the line.

For this one I KEEP GETTING

Y= - (3)/(2)x-2.5

Problem #2
Find the y-intecept and slope of

7x+9y=72

Slope is: - (9)/(8)
y-intercept: (0,8)

The equation of a straight line is given by

(y2-y1)/(X2-x1)

Y2=2, y1=-1
x2=-1, x1=-1

substitute and find the slope

In the second part the general equation of a straight line is given by

y=mx+c where m=slope and c=intercept.

you need to compare the equation given with the general equation, but to do that they need to be in the same form

i.e y=mx+c

but 7x+9y=72 is not in this form

To get you started subtract 7x from each side:

9y=72-7x

but this is still not in the correct form so you still need to rearrange it.

## Similar Questions

1. ### Math , correction

correct Write the equation of the line passing through each of the given pairs of points. Write your result in slope-intercept form, where possible. (2,-3) and (2,4) this is what i did for it. m= (4-(-3))/(2-2)=(7)/(0)= slope is undefined …
2. ### Algebra

I'm suppose to write an equation with the following information: Line passes through (2,-6) and is parallel to x=8 I know i must use the slope point form the problem is that since x=8 I don not know which is the slope. Please help …
3. ### math,correction

find the slope of any line perpendicualr to the line through points (3,3) and (2,8) so i did: y= (8-3)/(2-8)= (5)/(-6) to find another line perpendicular do i have to take one set of the points and substitute them into y=mx+b?
4. ### math, correction

bobpursley. i'm still questioning the problem states find the slope of any line perpendicualr to the line through points (3,3) and (2,8). y= (8-3)/(2-3) the slope i get is. (5)/(-1) for the first slope now to get any line perpendicular …
5. ### Algebra

Could someone correct my answers and help with the other problems?
6. ### alg.

Find the slope of the line passing through the points (–2, 1) and (3, 9). I know the equation to figure this out is: m = y(2) + y(1) ----------- x(2) + x(1) but its a multiple choice question and my answer is not the same as the …
7. ### Algebra

Can someone check my answers? 1. Write the equation of the line that passes through point (–2, 3) with a slope of –4. Answer: y = -4x - 5 2. Find the slope and y-intercept. x = –8 Answer: Slope: undefined; y-intercept: none 3.
8. ### algebra

Find the slope of any line perpendicular to the line through the points (0,5) and (-3,-4) Write the equation of the line passing through each of the given pairs of points. Write the answer in slope-intercept form, where possible. (-1,3) …
9. ### math

i have more than one question so if u no any of the answers please tell me 1.) write the point-slope form of the equation of the line with slope -2 passing through the point ( -5, -9). 2.) write the point-slope form of an equation …
10. ### math

graph the line with slope 1/2 passing through the point(-5,-2) find the slope of the line 5x+5y=3 write answer in simplest from consider the line 2x-4y=4 what is the slope of a line perpendicular to this line. what jis the slope of …

More Similar Questions