John’s weight loss function is y=2x+5

John’s weight loss function is y is equal to 2 x plus 5

John’s weight loss function is y=5x+2
John’s weight loss function is y is equal to 5 x plus 2

John plans on losing 5 pounds per week.
John plans on losing 5 pounds per week.

The function of John’s weight loss is linear.
The function of John’s weight loss is linear.

John's weight loss function is y=2x+5, indicating that he will lose 2 pounds per week plus an additional 5 pounds. This is a linear function, as it follows a straight line on a graph.