1. which ratios form a proportion? use equivalent ratios to test each pair.
a. 4/9, 2/3 b. 6/15, 9/12 c. 12/16, 15/20 d. 18/ 20, 24/30 2. which ratio forms a proportion with 20/30? use equivalent ratios to test each ratio.
a. 16/24 b. 10/20 c. 17/51 d. 16/60 3. which ratios form a proportion? use cross products to test each pair.
a. 15/40, 35/90 b. 18/22, 45/55 c. 12/55, 33/121 d. 17/31, 32/45 4. which ratios form a proportion? use cross products to test each pair.
a. 9/17, 27/50 b. 12/35, 24/75 c. 15/55, 32/121 d. 12/35, 20/70 5. which ratios do not form a proportion? a. 24/96, 27/108 b. 17/102, 12/70 c. 21/51, 35/85 d. 45/75, 63/105