Q8. - Algebra 1

Question

Write an equation of the line in slope-intercept form that passes through the given points.  

$\left(7,-1\right)$, $\left(9,-4\right)$

Step-by-Step Solution

Answer

The required equation is represented by $y=\frac{-3}{2}x+\frac{19}{2}$.

Step 1. Determine the formula that can be used.

The standard form associated with line that is having a travel through points which are two in count $y-y_1=\frac{y_2-y_1}{x_2-x_1}\left(x-x_1\right)$ can be used to calculate the required equation.

Step 2. Take the help of the obtained method.

Take the help of obtained standard form represented by $y-y_1=\frac{y_2-y_1}{x_2-x_1}\left(x-x_1\right)$ in which the required values can be filled by using the provided points as they are in the form of $\left(x_1,y_1\right)$$\left(x_2,y_2\right)$.

$$\begin{gathered} y-\left(-1\right)=\frac{-4-\left(-1\right)}{9-7}\left(x-7\right) \\ y+1=\frac{-3}{2}\left(x-7\right) \\ y=\frac{-3}{2}\left(x\right)+\frac{21}{2}-1 \\ y=\frac{-3}{2}x+\frac{19}{2} \end{gathered}$$

Step 3. Write the conclusion.

The obtained equation is $y=\frac{-3}{2}x+\frac{19}{2}$ so it is the required equation.