Given
- point (-4, -8)
- line y = -3x +3
Find
The equation of the line through the given point parallel to the given line ...
- in point-slope form
- in slope-intercept form
Solution
The given line's equation is is slope-intercept form. The slope is -3, the coefficient of x.
In point-slope form, the equation of a line with slope m through point (h, k) is ...
... y -k = m(x -h)
For slope m=-3 and point (h, k) = (-4, -8) the equation of the line is ...
... y +8 = -3(x +4) . . . . equation in point-slope form
We can eliminate parentheses and add -8 to put this equation in slope-intercept form.
... y +8 = -3x -12
... y = -3x -20 . . . . equation in slope-intercept form