Line Equations
1. The problem asks for equations of lines passing through the point $(2, -5)$ under different conditions.
2. (a) A line with slope $-3$ passing through $(2,-5)$:
Use point-slope form: $$y - y_1 = m(x - x_1)$$
where $m = -3$ and $(x_1, y_1) = (2, -5)$.
$$y - (-5) = -3(x - 2)$$
Simplify:
$$y + 5 = -3x + 6$$
$$y = -3x + 1$$
3. (b) A line parallel to the x-axis is horizontal, so its slope is 0.
The line passing through $(2,-5)$ is:
$$y = -5$$
4. (c) A line parallel to the y-axis is vertical, so its equation is of the form:
$$x = c$$
Since it passes through $(2,-5)$, $x=2$.
5. (d) Find the slope of the given line $2x - 4y = 3$:
Rearranged to slope-intercept form:
$$-4y = -2x + 3$$
$$y = \frac{1}{2}x - \frac{3}{4}$$
So slope $m = \frac{1}{2}$.
A parallel line has the same slope $m=\frac{1}{2}$ and passes through $(2,-5)$.
Using point-slope form:
$$y - (-5) = \frac{1}{2}(x - 2)$$
$$y + 5 = \frac{1}{2}x - 1$$
$$y = \frac{1}{2}x - 6$$
Final answers:
(a) $$y = -3x + 1$$
(b) $$y = -5$$
(c) $$x = 2$$
(d) $$y = \frac{1}{2}x - 6$$