Answer
(a) 2 groups donated at least $5,000,000$ dollars to the Disaster Relief Fund in 2005.
(b) $d(1)=15$
Work Step by Step
(a) In this case $x=5$ and $d(x)=2$ therefore a sentence of interpretation is:
2 groups donated at least $5,000,000$ dollars to the Disaster Relief Fund in 2005.
(b) Here, fifteen groups donated at least 1 million dollars. If we want to translate it to the function, $x$ represents the million dollars at least donated by the groups, therefore $x=1$
$d(x)$ represents the number of groups, therefore $d(x)=15$.
$d(1)=15$
