Question

While moving from left to right on the real number line, how many times will the expression a'-a
change its values from positive to negative?
Note: а is any real number on the number line.​

Answer 1

Answer:

4

Step-by-step explanation:

let's suppose 2 is the number a so to change the value of -2 we will need to move 4 spaces to the right of -2 to reach 2

Answer 2

Answer:

While moving from left to right on the real number line, the expression changes its value twice.

Number Line:

• A number line can be defined as a visual representation of the numbers on a straight line.
• The number line extends infinitely on both sides horizontally as well as vertically.
• All the numbers on a number line are placed at equal intervals from each other.

Step-by-step explanation:

1. Suppose a is an arbitrary real number on the number line.
2. On tracing the number line from negative infinity to positive infinity, the chosen number will be encountered two times.
3. Once on the negative side of zero on the number line and second on the positive side of zero on the number line.

Therefore, the expression changes its value from positive to negative two times while going left to right on a number line.

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