Question

Sara has a stick that she wishes to enlarge. What do you think the scale factor should be?

• A. Greater than $1$
• B. Less than $1$
• C. $1$

Answer 1

The correct option is A Greater than $1$

Concept: $\text{Original length}\times \text{Scale factor}=\text{New length}$

$\Rightarrow \text{Scale factor}=\frac{\text{New length}}{\text{Original length}}$

As Sara wants to enlarge the stick that means
$\Rightarrow \text{New length}>\text{the original length}$.

$\Rightarrow \frac{\text{New length}}{\text{Original length}}>1$

$\therefore \text{Scale factor}>1$

For example:
To enlarge the length from $2$ inch to $4$ inch, scale factor is $2$ which is greater than $1$.