# algebra

posted by .

could someone check my answers to these few questions?

"What is the equation of the line, in slope-intercept form, that goes through the point (-1, -8) with m = 3 ?"

here's my work:
y + 8 = -3(x + 1) [i put the values into the equation.]
y = -3x + 5 [i multiplied -3 by 1 and added 8 to both sides.]

is this right? my main question is whether or not i would add or subtract 8 in this situation. i know that y - (-8) is exactly the same as y + 8, so, in that case, would i subtract 8 from both sides?

• algebra -

y = mx + b

-8 = (3)(-1) + b
-8 = -3 + b
-8 + 3 = -3 + 3 + b

b = -5
y = 3x -5

• algebra -

unfortunately, y = 3x -5 is not an answer. here are my option:

A. y = -3x + 11
B. y = -3x + 5
C. y = -3x - 11
D. y + 1 = -3(x + 8)

• algebra -

this is slope intercept form: y - y1 = m(x-x1)

• algebra -

oh wait nevermind, oops, that is not slope intercept form

• algebra -

(-1, -8)
m = 3

y -y1 = m (x -x1)

y -(-8) = 3 ( x - (-1))
y + 8 = 3(x + 1)

y + 8 = 3x + 3

y + 8 - 8 = 3x + 3 -8

y = 3x -5

Slope intercept form
y = mx + b

• algebra -

The problem is the slope.

All the options indicate a slope of -3, but you stated the slope to be +3

Kuai's solution is correct according to the data supplied.

• algebra -

oops, sorry!

## Similar Questions

in questions 1 and 2, write an equation of the line in slope-intercept form. 1. the slope is -4/3; the y-intercept is -2. 2. the slope is 0; the y-intercept is -5. my answers: 1.y=-4/3-2 2. y=-5 ______________________ write an equation …
2. ### math

I have a few question so I will number them off. Please answer them for me I have a test tommorow and I am sure this can help other people too. 1.How do you make an equation that passes through a y-intercept and a certain point in …
3. ### 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 …
4. ### algebra

could you please see if i have correct answers thanks very much use the point-slope form linear equation y-3=3(x+1) a. slope is 3 b. point this line passes through that is basis of this equatio y = 3 x = -1 c. rewrite this equation …
5. ### algebra

Could someone please check my work. what is the slope of the line that passes through the given points?
6. ### Algebra

I have an assignment that asks me to write an equation in slope-intercept, point-slope, or standard form for the information given and to explain why the chosen form would be best. Below is the information given. 1. passing through …
7. ### Math

Use the point-slope form linear equation given to complete the following problems. y-3=3(x+1) 1. What is the slope of the given line?
8. ### geometry

I would love for someone to check my work on the seven problems that I did. I would be eternally grateful. I am going to list my problems and answers. Even if you only want to check one of them, that would be great. 1. Write an equation …
9. ### Math

Can someone please check my work? Write the slope-intercept (y = mx +b) form of the equation from the information given. 1. Slope = ½ and b = -3 Y=1/2-3 2. Slope equals 2 and the line goes through the point (-1, 3) Y=2x+5 3. The line
10. ### Algebra 2

Can someone help me with this equation please?

More Similar Questions