At the beginning of the year, Nicole has $5,000 in her checking account. She receives a $1,000 paycheck from her job each week. Each paycheck is deposited directly into her account. Write an equation relating the amount of money in Nicole's account, y, to the number of weeks that have passed since the beginning of the year, x. The equation should be in slope-intercept form. What is the y-intercept? What does this point represent in the context of the word problem?