When the price of product a rises, the quantity of product b that is purchased decreases. products a and b are:

They are Complimentary Goods.

Explanation:

Complimentary goods are defined in economics as products that  whose use is related to the use of an associated or paired good.

i.e.: Like Cars and Petroleum

When the price is increase in one product, then the quantity demand for that product decreases. This in tern affects the other related product and the quantity demand of that related product  falls as well.

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"we first find value of tax in dollars.

the difference between the two prices   is: 23. 54 - 22 = 1.54

therefore the sales tax in dollars is 1.54

the tax % will be   (amount of tax / original cost price ) × 100

(1.54 / 22) × 100  → (0.07) × 100 =   7

so the tax rate is 7%

we can double check the answer.

7 % of 22   → (7/100) × 22 → 0.07 × 22 = 1.54

22 + 1.54 = 23.54"