Question

Elani signed up for an installment plan with 0% interest to purchase a new couch that costs $770. she creates an equation to model the situation, where x represents the number of months and y represents the balance of the installment account: y = 770 − 55x. determine the missing steps and justifications in the solution. subtraction property of equality subtraction property of equality y − 770 = -55x y − 770 = -55x division property of equality division property of equality = x = x = - x y − 770 = -715x addition property of equality multiplication property of equality multiplication property of equality

Answer 1

The subject of this question is Mathematics at a High School level. The independent variable is x and the dependent variable is y in the equation y = 770 - 55x. The y-intercept is -770 and the slope is -55.

Step-by-step explanation:

The subject of this question is Mathematics and it is suitable for High School level.

In the given equation, y = 770 - 55x, the independent variable is x which represents the number of months and the dependent variable is y which represents the balance of the installment account.

The y-intercept is -770, which means when x = 0, the balance of the installment account is $770. The slope is -55, which represents the decrease in the balance of the account for each additional month.