Is do Today Middle school math

All Multiple choice

Question 1
What does the slope represent in this situation?

Every week he saves $40
Every 4weeks he saves $60
Every week he save $20
Every 4 weeks he saves $20

Question 2
What does the vertical intercept (y intercept) represent in this situation?

He has already saved $40
He has already saved $20
He has saved $40 a week
He will save $40 next week

Question 3
Is the slope increasing or decreasing?