Questions: Draw the graph of each of the 3 equations below.
Transcript text: Draw the graph of each of the 3 equations below.
Solution
Solution Steps
Step 1: Rewrite the Equation in Slope-Intercept Form
The given equation is:
\[ -x - 2y = -4 \]
To rewrite it in slope-intercept form (\(y = mx + b\)), solve for \(y\):
\[ -2y = x - 4 \]
\[ y = -\frac{1}{2}x + 2 \]
Step 2: Identify the Slope and Y-Intercept
From the equation \( y = -\frac{1}{2}x + 2 \):
The slope (\(m\)) is \(-\frac{1}{2}\).
The y-intercept (\(b\)) is \(2\).
Step 3: Plot the Y-Intercept
Plot the y-intercept (0, 2) on the graph.
Step 4: Use the Slope to Find Another Point
From the y-intercept, use the slope \(-\frac{1}{2}\) to find another point. The slope means that for every 1 unit increase in \(x\), \(y\) decreases by \(\frac{1}{2}\):
Starting from (0, 2), move 1 unit to the right (x = 1) and \(\frac{1}{2}\) unit down (y = 1.5). This gives the point (1, 1.5).
Step 5: Draw the Line
Draw a straight line through the points (0, 2) and (1, 1.5).
Final Answer
The graph of the equation \( -x - 2y = -4 \) is a straight line passing through the points (0, 2) and (1, 1.5).