Function 1 :
The equation for function 1 is in slope-intercept form by which we can identify the y-intercept easily..

Where,
- m is slope
- b is y-intercept
Compare to the given equation:
Function 2 :
- Observe the point where function meets the y-axis
- The point of meeting is (0,-7)
- Thus, The y-intercept is -7


Therefore, Function 2 has greater y-intercept...~