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Use graph paper for this question: (i) ...

Use graph paper for this question:
(i) Draw the graphs of `3x-y-2=0` and `2x+y-8=0`. Take 1 cm=1 unit on both the axes and plot only three points per line.
(ii) Write down the co-ordinates of the point of intersection and the area of the triangle formed by the lines and the x-axis.

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The correct Answer is:
To solve the problem step by step, we will follow the instructions given in the question. ### Step 1: Convert the equations to slope-intercept form We start with the two equations: 1. \(3x - y - 2 = 0\) 2. \(2x + y - 8 = 0\) We will rearrange these equations to express \(y\) in terms of \(x\). For the first equation: \[ 3x - y - 2 = 0 \implies y = 3x - 2 \] For the second equation: \[ 2x + y - 8 = 0 \implies y = 8 - 2x \] ### Step 2: Choose values for \(x\) and calculate corresponding \(y\) values We will select three values for \(x\) for each equation and calculate the corresponding \(y\) values. **For the first equation \(y = 3x - 2\)**: - If \(x = 0\), then \(y = 3(0) - 2 = -2\) → Point (0, -2) - If \(x = 1\), then \(y = 3(1) - 2 = 1\) → Point (1, 1) - If \(x = 2\), then \(y = 3(2) - 2 = 4\) → Point (2, 4) **For the second equation \(y = 8 - 2x\)**: - If \(x = 0\), then \(y = 8 - 2(0) = 8\) → Point (0, 8) - If \(x = 1\), then \(y = 8 - 2(1) = 6\) → Point (1, 6) - If \(x = 2\), then \(y = 8 - 2(2) = 4\) → Point (2, 4) - If \(x = 3\), then \(y = 8 - 2(3) = 2\) → Point (3, 2) ### Step 3: Plot the points on graph paper Using graph paper, plot the points calculated for both equations: - For \(y = 3x - 2\): (0, -2), (1, 1), (2, 4) - For \(y = 8 - 2x\): (0, 8), (1, 6), (2, 4), (3, 2) ### Step 4: Draw the lines Connect the points for each equation to form straight lines. The first line will connect the points (0, -2), (1, 1), and (2, 4). The second line will connect the points (0, 8), (1, 6), (2, 4), and (3, 2). ### Step 5: Find the point of intersection From the graph, observe where the two lines intersect. The intersection point can be determined from the plotted points: - The lines intersect at the point (2, 4). ### Step 6: Calculate the area of the triangle formed by the lines and the x-axis The triangle is formed by the x-axis and the points of intersection with the lines. The vertices of the triangle are: - (0, 0) (the origin) - (2, 0) (the x-intercept of the line \(y = 3x - 2\)) - (2, 4) (the intersection point) To find the area of the triangle, we can use the formula: \[ \text{Area} = \frac{1}{2} \times \text{base} \times \text{height} \] Here, the base is the distance along the x-axis from (0, 0) to (2, 0), which is 2 units. The height is the y-coordinate of the intersection point (2, 4), which is 4 units. Thus, the area is: \[ \text{Area} = \frac{1}{2} \times 2 \times 4 = 4 \text{ square units} \] ### Final Answers 1. The coordinates of the point of intersection are \((2, 4)\). 2. The area of the triangle formed by the lines and the x-axis is \(4\) square units. ---
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