A stalk of corn grew 42 inches in a week. Find the unit rate in inches per day

1 week = 7 days

42 inches per week

We want to find out how many inches grow per day.

42 / 7 = 6

So, everyday the corn grows 6 inches.

To find the unit rate, we need to set the number of days to 1. Therefore, we will divide by 7. We also have to divide 42 by 7 to make sure the equation stays proportional. Using this knowledge, we can see that if the corn grew 42 inches in 7 days, it grows 6 inches per day.