Answer:
6
Step-by-step explanation:
The ratio of [tex]\frac{y}{x}[/tex] is a constant
[tex]\frac{y}{x}[/tex] = [tex]\frac{4}{14}[/tex] = [tex]\frac{8}{28}[/tex] = [tex]\frac{2}{7}[/tex]
That is y = [tex]\frac{2}{7}[/tex] x
When x = 21, then
y = [tex]\frac{2}{7}[/tex] × 21 = 6
