Question

zhao uses the equation, $63.25 = 800r + 3.50$ to represent the situation. what does the variable $r$ represent in the equation? choose 1 answer: a the number of kilowatt - hours zhao used b the charge per kilowatt - hour c the amount of the total charge that depends on the number of kilowatt - hours used

Explanation:

In the equation \( 63.25 = 800r + 3.50 \), we can think of it as a cost - related equation. The total cost is \( 63.25 \), \( 3.50 \) is likely a fixed cost, and \( 800r \) represents the variable cost. If we assume that \( 800 \) is the number of kilowatt - hours used, then \( r \) would be the charge per kilowatt - hour. Option A is incorrect because if \( r \) were the number of kilowatt - hours, the equation would not be structured this way. Option C is also incorrect because the amount of the total charge that depends on the number of kilowatt - hours used would be \( 800r \), not \( r \) itself.

Answer:

B. The charge per kilowatt - hour