I would find it easiest to reduce the number to minutes, like this: 500 in 20 minutes would be 500 divided by 20 = 25 pteradactyls /min.
There are 90 minutes in an hour and a half, so 25 x 90 = 2,250 pteradactyls in 1 1/2 hours.
You find the slope because the constant rate it the same as the slope. Then you simplify
Answer:
d
Step-by-step explanation:
The anwser is c because 68 is normal for adults sus
When rates expressed as a quantaty of 1, such as 2 feet per second or 5 miles per hour