Final answer:
Using the line of best fit equation y = -353.71x + 18,075, the balance of the loan will reach $0 after approximately 51 months when solving for x with the y-value set to zero.
Step-by-step explanation:
To determine after how many months the balance of the loan will reach $0, we use the equation of the line of best fit y = -353.71x + 18,075. To find the x-value when y is zero (0), we set the equation equal to zero and solve for x (the number of months):
0 = -353.71x + 18,075
To isolate x, we move -353.71x to the other side of the equation:
353.71x = 18,075
Then, divide both sides by 353.71 to solve for x:
x = 18,075 / 353.71
x ≈ 51 months
Therefore, the balance of the loan will reach $0 after approximately 51 months.