Find the equation of the least-squares regression line ŷ and the linear correlation coefficient r for the given data. Round the constants, a, b, and r, to the nearest hundredth. {(1, 3), (3, 6), (5, 12), (7, 16), (9, 20)}

A bottle of Medicine X contains 500 mL of syrup.  The prescribed dose is 5 mL 3 times per day.  How many mL of medication does the child need to be given per day?

The price of a loaf of bread was $0.70 in 1975 and $1.75 in 2011. Based on this information find the following: a. The value of the 2011 dollar in 1975 dollars. b. The value of the 1975 dollar in 2011 dollars.

A taxicab company charges $4 for a trip up to 1 mile, and $2 for every extra mile ( or portion of a mile). Find the cost to ride 11 1/2  miles.

Karla picks up her friend who lives in another city and they head north on a road trip. Karla looks at a map and sees that after 5 hours of driving, they are passing mileage marker 352 on Highway 277. After driving for 12 hours, they pass mileage marker 842. What is Karla's average rate during the road trip? miles per hour

"Thirty-two is twice a number increased by eight"

They each have a fish tank holding 20 units of water. Whose tank holds 20 gallons, and whose holds 20 cups? Explain your reasoning.

For​ exercise, Mae jogs 2 miles then walks an additional 4 miles. If her jogging speed is 4.5 miles per hour faster than her walking speed and her total exercise time is 3 ​hours, what is her walking​ speed?

A field that is 3/4 acres must be planted with seed. If 24 people will split the job equally, how many acres must each person plant?Write your answer in simplest form.

It says if Jamal rides his bike to school and back home. It is two miles each way. How many miles does he ride in five days?