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Using a Scale of 2cm to 1unit on the x-axis and 2cm to 5units on the y-axis, draw the graph of x2 - 2x - 2.

Mathematics

ScanSolve AI Answer

Graph of y = x² − 2x − 2

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Key points of y = x² − 2x − 2
Pointxy
x-intercept−0.730
y-intercept0−2
Minimum1−3
x-intercept2.730

Step-by-step solution

4 steps

To draw the graph of y=x2−2x−2y = x^2 - 2x - 2 using the given scale, follow these steps:

  1. Set up the coordinate axes.

    Draw a horizontal xx-axis and a vertical yy-axis on graph paper. Label them xx and yy respectively.

  2. Apply the given scales to the axes.

    • On the xx-axis: Mark every 2 cm2 \text{ cm} interval as 1 unit1 \text{ unit}. So, the major grid lines at 2 cm,4 cm,6 cm,…2 \text{ cm}, 4 \text{ cm}, 6 \text{ cm}, \dots from the origin will be labeled 1,2,3,…1, 2, 3, \dots to the right and −1,−2,−3,…-1, -2, -3, \dots to the left.
    • On the yy-axis: Mark every 2 cm2 \text{ cm} interval as 5 units5 \text{ units}. So, the major grid lines at 2 cm,4 cm,6 cm,…2 \text{ cm}, 4 \text{ cm}, 6 \text{ cm}, \dots from the origin will be labeled 5,10,15,…5, 10, 15, \dots upwards and −5,−10,−15,…-5, -10, -15, \dots downwards.
  3. Plot the points from the table.

    Using the table of values from the previous part:

    x−4−3−2−101234y221361−2−3−216\begin{array}{|c|c|c|c|c|c|c|c|c|c|} \hline x & -4 & -3 & -2 & -1 & 0 & 1 & 2 & 3 & 4 \\ \hline y & 22 & 13 & 6 & 1 & -2 & -3 & -2 & 1 & 6 \\ \hline \end{array}

    Plot each (x,y)(x, y) pair on your graph paper according to the scales defined in Step 2. For example, to plot (−4,22)(-4, 22):

    • Move 4 units to the left on the xx-axis (which is 4×2 cm=8 cm4 \times 2 \text{ cm} = 8 \text{ cm} to the left).
    • Move 22 units up on the yy-axis (which is 225×2 cm=4.4×2 cm=8.8 cm\frac{22}{5} \times 2 \text{ cm} = 4.4 \times 2 \text{ cm} = 8.8 \text{ cm} up).
  4. Draw a smooth curve.

    Once all points are plotted, draw a smooth, continuous curve through them. This curve will be a parabola, representing the graph of y=x2−2x−2y = x^2 - 2x - 2.

    Since I cannot physically draw the graph, these instructions explain how to construct it.

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