Answer:
Part A) The equation of the line m is
![x=3](https://img.qammunity.org/2020/formulas/mathematics/middle-school/jmja0xwsmt4jtrinnsn2lhtcie4am0nxwn.png)
Part B) The equation of the line n is
![y=-4](https://img.qammunity.org/2020/formulas/mathematics/high-school/wsfe7pri627o07y4frl5xvuxisjsnbtcv1.png)
Explanation:
Part A) Line m has no y-intercept, and its x-intercept is (3, 0)
we know that
If a line has no y-intercept , then is a vertical line (parallel to the y-axis)
the equation of the line m is equal to the x-coordinate of the x-intercept
so
![x=3](https://img.qammunity.org/2020/formulas/mathematics/middle-school/jmja0xwsmt4jtrinnsn2lhtcie4am0nxwn.png)
Part B) Line n has no x-intercept, and its y-intercept is (0, -4)
we know that
If a line has no x-intercept , then is a horizontal line (parallel to the x-axis)
the equation of the line n is equal to the y-coordinate of the y-intercept
so
![y=-4](https://img.qammunity.org/2020/formulas/mathematics/high-school/wsfe7pri627o07y4frl5xvuxisjsnbtcv1.png)