Question:
On a coordinate plane, a line goes through (negative 3, 2) and (0, 1). A point is at (3, 4). What is the equation of the line that is perpendicular to the given line and passes through the point (3, 4)? y = –One-thirdx + 5 y = –One-thirdx + 3 y = 3x + 2 y = 3x − 5
Answer:
Option D:
is the equation of the line
Step-by-step explanation:
It is given that the line passes through the points
and
![(0,1)](https://img.qammunity.org/2021/formulas/mathematics/high-school/egl0nknlwsob16ornzj3fqitalfd977yd1.png)
We shall find the equation of the line that passes through the points
and
![(0,1)](https://img.qammunity.org/2021/formulas/mathematics/high-school/egl0nknlwsob16ornzj3fqitalfd977yd1.png)
Slope
![m=(1-2)/(0+3)](https://img.qammunity.org/2021/formulas/mathematics/college/ddlyk4eesnkrq70fbc3h17c3lltvum69go.png)
![m=(-1)/(3)](https://img.qammunity.org/2021/formulas/mathematics/college/d4kglj669sr7rytint5c7dkxy2qaps8kfl.png)
Also, it is given that the line is perpendicular to the line having slope
![m=(-1)/(3)](https://img.qammunity.org/2021/formulas/mathematics/college/d4kglj669sr7rytint5c7dkxy2qaps8kfl.png)
Since, we know that if two lines are perpendicular, then the product of the two slope is equal to -1.
Thus, we have,
![m_1\cdot m_2=-1](https://img.qammunity.org/2021/formulas/mathematics/college/ifp05165buihr8krbgbh6jeg9aosng228q.png)
![(-1)/(3) \cdot m_2=-1](https://img.qammunity.org/2021/formulas/mathematics/college/fgz0b27vsenr5xzrf6ymjkwbqlsjk4vfzb.png)
![m_2=3](https://img.qammunity.org/2021/formulas/mathematics/college/m0e40cp5ie0z4b2w83tvww7v7d8j8wsz1j.png)
Thus, the slope of the line is
and passes through the point
![(3,4)](https://img.qammunity.org/2021/formulas/mathematics/middle-school/u11bjq8wk8zxe0jolxoln3xp3fn8yhtaxu.png)
Now, we shall find the equation of the line using the formula,
![y-y_1=m(x-x_1)](https://img.qammunity.org/2021/formulas/mathematics/middle-school/ks7lzc9jj3emt3ptrdvrvr0uzhz4c0qyo5.png)
Thus, we have,
![y-4=3(x-3)](https://img.qammunity.org/2021/formulas/mathematics/college/pcgwhz121163onu1bsnvitp0nwv74r9jti.png)
![y-4=3x-9](https://img.qammunity.org/2021/formulas/mathematics/college/vk9vcl6fb0h3qmh1qiyaq2yg0bfm7i8b38.png)
![y=3x-5](https://img.qammunity.org/2021/formulas/mathematics/middle-school/dxt08oti4k1n6b8otihnzmmjawxksln7vc.png)
Thus, the equation of the line is
![y=3x-5](https://img.qammunity.org/2021/formulas/mathematics/middle-school/dxt08oti4k1n6b8otihnzmmjawxksln7vc.png)
Hence, Option D is the correct answer.