**Answer:**

An expression can be used to find the value of y when x is 2 is,

y=8x ; Value of y = 16 when x = 2

**Step-by-step explanation:**

**Direct variation states:**

If y varies directly as x

⇒

**then the equation is in the form of**:

where, k is the constant of variation.

**As per the statement:**

If y varies directly as x, and y is 48 when x is 6.

⇒

y = 48 when x = 6

**Substitute the given values in [1] and solve for k we have;**

Divide both sides by 6 we have;

8 = k

or

k = 8

Then, an equation we have;

y =8x ….[2]

**We have to find value of y when x is 2.**

**Substitute the value of x = 2 in [2] we have;**

**Therefore, an expression can be used to find the value of y when x is 2 is, **

**y=8x and Value of y = 16 when x = 2**