Determine which description represents a proportional relationship. A farmer’s market sells different types of nuts in bulk. The cost of almonds is $7 per pound.

A craft store sells strings of glass beads. They cost $3 per string, or you can buy 3 strings for $8.

A craft store sells strings of glass beads. They cost $3 per string, or you can buy 3 strings for $8.

T-shirts at a store cost $15 each. If you purchase more than 2 T-shirts, you get a $3 discount on each T-shirt bought.,

A skateboard manufacturing company charges $75 per unit for an order of up to 100 skateboards, and $70 per unit for an order of 101–200 skateboards.

Jeffery conducted a survey in his school and found that 30 of the 50 eighth grade students' favorite subject is mathematics. based on the results, jeffery concluded that out of the 200 students in his school, 120 students' favorite subject is mathematics. select the statement that is true about jeffery's conclusion. a. jeffery's conclusion is not valid because the sample was biased since only 200 students were surveyed. b. jeffery's conclusion is valid because the sample was random since all of the students were eighth grade students. c. jeffery's conclusion is valid because the sample was random. d. jeffery's conclusion is not valid because the sample was biased since all of the students were eighth grade students.

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

Consider the functions below. function 1 function 2 function 3 select the statement which is true about the functions over the interval [1, 2] a b function 3 has the highest average rate of change function 2 and function 3 have the same average rate of change. function and function 3 have the same average rate of change function 2 has the lowest average rate of change d.