Final answer:
Using cross multiplication, the ratio 6:7 is not equivalent to 7:9.
Step-by-step explanation:
To determine if the ratio 6:7 is equivalent to 7:9, we can use cross multiplication. Cross multiplying both sides of the ratios, we have:
6 x 9 = 7 x 7
Simplifying the equation, we get 54 = 49. Since 54 is not equal to 49, the ratios are not equivalent. Therefore, the answer is b) No.