we know that
[tex]2[/tex] pounds of strawberries cost [tex]\$4.50[/tex]
so
by proportion
Find the cost of [tex]3[/tex] pounds of strawberries
[tex]\frac{4.50}{2} \frac{\$}{pounds} =\frac{x}{3} \frac{\$}{pounds}\\ \\x=(4.50*3)/2\\ \\x=\$6.75[/tex]
therefore
the answer is
[tex]\$6.75[/tex]