Which relation is a function?

a. {(1, 2); (1, 3); (1, 4); (1, 5)}
b. {(1, 2); (2, 3); (3, 4); (4, 5)}
c. {(1, 2); (2, 3); (3, 4); (2, 5)}
d. {(1, 2); (3, 2); (3, 3); (4, 2)}

b?

Use corrrct notations to name the sides

You are living in aldine, tx and you are planning a trip to six flags in arlington, tx. you look on a map that has a scale of 0.5 inches to 30 miles. if the map shows the scale distance from aldine to arlington is 4 inches, how far is the actual distance?

Brianna is getting materials for a chemistry experiment. her teacher gives her a container that has 0.15 liters of a liquid in it. brianna needs to use 0.4 of this liquid for the experiment. how much liquid will brianna use?