The modulus function

The modulus function Quiz

Spec 1.3 · Edexcel International A Level Maths: Quiz

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5 questions, one answer each

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1. Evaluate $|3-8|+|-2|$ .
- A. $3$
- B. $5$
- C. $7$
- D. $9$
2. What is the vertex of $y=|2x-4|$ ?
- A. $(2,0)$
- B. $(-2,0)$
- C. $(0,4)$
- D. $(4,0)$
3. Solve $|x-3|=5$ .
- A. $x=8$ only
- B. $x=2$ and $x=8$
- C. $x=-8$ and $x=2$
- D. $x=-2$ and $x=8$
4. Solve $|x-1|>2$ .
- A. $-1<x<3$
- B. $x<-1$ or $x>3$
- C. $x>3$
- D. $x<-1$
5. The graph of $y=|f(x)|$ is formed from $y=f(x)$ by
- A. reflecting everything in the $y$ -axis
- B. reflecting the $x>0$ part in the $y$ -axis
- C. reflecting the parts below the $x$ -axis in the $x$ -axis
- D. translating up by $1$