Question 3 of 6 · Transformation of Curves
Questionmedium

The graph of is shifted 3 units to the left and then reflected in the x-axis. The equation of the new graph is

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Answer: Option A —

Detailed Solution

1

Shift 3 units left: replace by , giving .

2

Reflect in the x-axis: replace by , giving .

✓ Check

The vertex moves from (0, 0) to (−3, 0) and the parabola now opens downward.

⚠ Common trap

(B) — uses for a left shift.

Quick tip

Left : ; reflect in x-axis:

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More Transformation of Curves Questions

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  1. Q1.The graph of is obtained from the graph of by shifting it
  2. Q2.The vertex of the graph of is at
  3. Q3.The graph of is the reflection of the graph of in
  4. Q4.The range of is
  5. Q5.If the graph of is shifted by 5 units up along the y-axis and 2 units to the right along the x-axis, then the equation of the resultant graph is

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Transformation of Curves — Preparation

This question tests your understanding of Transformation of Curves, a key topic in the Quantitative Aptitude section. The detailed solution above uses a step-by-step approach to show the reasoning, and where available, a shortcut that helps you solve similar questions in under 90 seconds during the actual exam.

Transformation of curves is about how the graph of a function changes when its equation is modified. If you know the graph of y = f(x), you can sketch related graphs without plotting points. This topic covers shifts (y = f(x) + k moves the graph up, y = f(x - h) moves it right), reflections in the axes (y = -f(x) and y = f(-x)), stretches and compressions (y = af(x) and y = f(ax)), and graphs involving modulus such as y = |f(x)| and y = f(|x|). Exam questions ask you to identify the graph of a transformed function, find the new position of a point or vertex, or count the solutions of an equation using graphs. A common trap is the direction of horizontal shifts: f(x - 2) moves the graph two units to the right, not the left. Practise the transformation of curves questions below, each with a step-by-step solution.