Question

answer
point a means that the unit rate is 2 pounds per dollar
point b means that the unit rate is $4.50 per pound
point a means that the unit rate is $9.00 per pound
point b means that the unit rate is 4.5 pounds per dollar

Explanation:

Step1: Identify coordinates of point A

Point A is at (2, 9). This means for 2 pounds, the cost is $9.

Step2: Calculate unit - rate for point A

The unit - rate (cost per pound) is $\frac{9}{2}=4.5$ dollars per pound.

Step3: Identify coordinates of point B

Point B is at (1, 4.5). This means for 1 pound, the cost is $4.5. So the unit - rate for point B is $4.50 per pound.

Answer:

Point B means that the unit rate is $4.50 per pound