I Need Help on Slopes!!!!!!

Question

1) What is the slope of the line containing the points (2,6) and (-3,-4)?

2) The equation for the horizontal line passing through the points (-5, -4), (-2, -4), (3, -4) is:

3) Change this standard form equation into slope intercept form, then name the slope and the y-intercept.

2x - 3y = 12

Answer 1

I know why she posed this question here! Because Y! Answer has a word filter that chooses in what category is the question posed. Slopes = Snowboard as well... Yahoo Answers suggested to pose her question here but she didn't bother changing the category. :P (I'm just bored...) Sorry everyone...

Answer 2

I'm not sure why you are asking for math homework help in the "snowboarding" section and its been 25 years since basic algebra, but here goes:

1. Slope is rise over run which is (y2 - y1) / (x2 - x1) - I'm sure you can get that one

2. The equation for any horizontal line is Y = constant. In this case, all the y coordinates are -4 so Y = -4.

3. Slope-intercept form is y = mx + b, where b is the y-intercept, so just slove the equation for y

2x - 3y = 12

-3y = 12 -2x (subtract 2x from both sides to get rid of +2x from y side)

y = -4 + 2/3x (divide both sides by -3 to get rid of -3 from y side)

y = 2/3x - 4 (re-arange in slope-intercept form)

so y-intercept is (-4)

Good Luck