## Monday, July 27, 2009

### practice for slope and slope intercept from point slope

1a) Find the slope of the line that passes through (1, 5) and (4, -7).
1b) Find the slope intercept version of the linear equation for this line.

2a) Find the slope of the line that passes through (1, 0) and (4, 0).
2b) Find the slope intercept version of the linear equation for this line.

3a) Find the slope of the line that passes through (1, 4) and (1, -7).
3b) Find the slope intercept version of the linear equation for this line.

#### 1 comment:

Prof. Hubbard said...

1a) Find the slope of the line that passes through (1, 5) and (4, -7).

Slope = (5-(-7))/(1-4) = 12/-3 = -4.

1b) Find the slope intercept version of the linear equation for this line.

Using the point (1, 5), we have

y - 5 = -4(x - 1)
Clearing parentheses.
y - 5 = -4x + 4
y = -4x + 9

2a) Find the slope of the line that passes through (1, 0) and (4, 0).

Slope = (0-0)/(1-4) = 0/-3 = 0.

2b) Find the slope intercept version of the linear equation for this line.

Using the point (1, 0), we have

y - 0 = 0(x - 1)
Clearing parentheses.
y - 0 = 0