Final answer:
The equation y = 5x + 210 represents Sal's weight loss over time, where x is the number of weeks and y is Sal's weight in pounds after x weeks.
Step-by-step explanation:
The subject of this question is Mathematics and the grade level is High School.
The equation provided is y = 5x + 210, which represents Sal's weight loss over time. In the equation, x represents the number of weeks and y represents Sal's weight in pounds after x number of weeks. The equation states that Sal's weight is equal to 5 times the number of weeks plus 210 pounds.
For example, if we plug in x = 1 into the equation, we get y = 5(1) + 210, which simplifies to y = 5 + 210. Therefore, Sal's weight after 1 week would be 215 pounds.