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The equation of a line is given below. \[ 2 x+4 y=-8 \] Find the \( x \)-intercept and the \( y \)-intercept. Then use them to graph the line.

Ask by Matthews Cervantes. in the United States
Mar 10,2025

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Tutor-Verified Answer

Answer

The \( x \)-intercept is at \((-4, 0)\) and the \( y \)-intercept is at \((0, -2)\). Plot these points and draw a straight line through them to graph the equation \( 2x + 4y = -8 \).

Solution

**Step 1. Find the \( x \)-intercept** - To find the \( x \)-intercept, set \( y = 0 \) in the equation: \[ 2x + 4(0) = -8 \quad \Rightarrow \quad 2x = -8 \] - Solve for \( x \): \[ x = \frac{-8}{2} = -4 \] - Thus, the \( x \)-intercept is at \((-4, 0)\). **Step 2. Find the \( y \)-intercept** - To find the \( y \)-intercept, set \( x = 0 \) in the equation: \[ 2(0) + 4y = -8 \quad \Rightarrow \quad 4y = -8 \] - Solve for \( y \): \[ y = \frac{-8}{4} = -2 \] - Thus, the \( y \)-intercept is at \((0, -2)\). **Step 3. Graph the Line Using the Intercepts** - Plot the two intercepts: - \( (-4, 0) \) on the \( x \)-axis. - \( (0, -2) \) on the \( y \)-axis. - Draw a straight line through these two points. - This line represents the equation: \[ 2x + 4y = -8 \]

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To find the \( x \)-intercept, set \( y = 0 \) in the equation \( 2x + 4y = -8 \): \[ 2x + 4(0) = -8 \implies 2x = -8 \implies x = -4. \] Thus, the \( x \)-intercept is \((-4, 0)\). Next, to find the \( y \)-intercept, set \( x = 0 \) in the equation: \[ 2(0) + 4y = -8 \implies 4y = -8 \implies y = -2. \] Therefore, the \( y \)-intercept is \((0, -2)\). Now, you can graph the line using these intercepts. Plot the points \((-4, 0)\) and \((0, -2)\) on a coordinate plane, then draw a straight line through these two points. The resulting line represents the equation \( 2x + 4y = -8 \). Now, let's keep this fun! Imagine your graph as a rollercoaster ride, starting at the thrilling heights of the \( y \)-intercept and swooping down to the wild lows of the \( x \)-intercept! Each point represents a unique moment on your graphing adventure. Also, here's a little secret about intercepts: they make great jumping-off points for understanding the behavior of the line. The \( x \)-intercept shows where the ride crosses the ground, while the \( y \)-intercept reveals how low or high the initial ascent takes you. So when you're graphing, remember these points, and they will guide your lines like loyal companions!

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