The table describing a proportional function is (partially) given below. What is the output ( $\displaystyle{y}\usepackage{cmbright}\Huge\$ -value) corresponding to the input $\displaystyle{x}={2}?\usepackage{cmbright}\Huge\$

$\displaystyle{x}\usepackage{cmbright}\Huge\$
$\displaystyle{y}\usepackage{cmbright}\Huge\$

1 4

2

3

4 16

$\displaystyle{x}\usepackage{cmbright}\Huge\$	$\displaystyle{y}\usepackage{cmbright}\Huge\$
1	4
2
3
4	16