Questions: For the equation, find three ordered pairs completing the table. Then use any two of the ordered pairs to graph the equation.
x-y=4
Complete the table below.
x y
4 0
2 -2
0 -4
Transcript text: For the equation, find three ordered par completing the table. Then use any two of the ordered pairs to graph the equation.
\[
x-y=4
\]
Complete the table below.
\begin{tabular}{|c|c|}
\hline$x$ & $y$ \\
\hline 4 & 0 \\
\hline
\end{tabular}
\begin{tabular}{|l|l|}
\hline 2 & -2 \\
\hline 0 & -1 \\
\hline
\end{tabular}
Solution
Solution Steps
Step 1: Substitute and Solve
Given the linear equation in the form $y = mx + b$, where $m$ is the slope and $b$ is the y-intercept,
we substitute the given $x$ values into the equation to find the corresponding $y$ values. For our equation, $m = 1$ and $b = -4$.
The calculations for each $x$ value are as follows:
For $x = 4$, $y = 1(4) - 4 = 0$.
For $x = 2$, $y = 1(2) - 4 = -2$.
For $x = 0$, $y = 1(0) - 4 = -4$.
This results in the following set of ordered pairs (x, y):
(4, 0), (2, -2), (0, -4)
Step 2: Graphing
To graph the equation, plot each of the ordered pairs on a coordinate plane.
Since the equation represents a straight line, only two points are strictly necessary to graph the line,
but more points can be used to verify accuracy. The plotted points are:
Point: (4, 0)
Point: (2, -2)
Point: (0, -4)
Step 3: Drawing the Line
After plotting the points on the coordinate plane, connect them with a straight line.
This line represents all the solutions to the equation, as any point on the line can be substituted back
into the equation to yield a true statement. The line is the graphical representation of the equation $y = mx + b$.
Final Answer:
The set of ordered pairs that satisfy the equation $y = mx + b$ are:
(4, 0), (2, -2), (0, -4)
These points can be used to graph the line represented by the equation on a coordinate plane.