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Program: LINES
LINES (free version available here)
- Finds the equation of a line, given any of the following pieces of information: slope and y-intercept, slope and point, 2 points, x-intercept and y-intercept, point and slope of parallel line, point and slope of perpendicular line.
- Changes the equation of a line from slope-intercept form to standard form or the reverse.
Useful for:
- SAT
- ACT
- Algebra 1
- Algebra 2
- Geometry
- Calculus
Try these problems using LINES:
Example 2
Q: Find the slope-intercept form of the equation:
7x - 3y = 9
Solution:
Run LINES. How?
Select choice 7.
Select choice 1 to
change the current
equation into slope-
intercept form.
Enter the values of
A, B, and C as
A, B, and C as
follows, pressing
ENTER after each
one:
The program reports:
Interpretation:
The top part gives the slope-intercept form:
See Example 1