Write an equation from a real-world situation

In y = mx + b, b is the starting amount and m is the change each period.

1. A jar holds 49 coins and 7 more coins are added each week. Write an equation for the amount y after x time periods, in the form y = mx + b.
2. A jar holds 5 coins and 5 more coins are added each week. Write an equation for the amount y after x time periods, in the form y = mx + b.
3. A hiker is 8 km from camp and walks toward it at 4 km every hour. Write an equation for the amount y after x time periods, in the form y = mx + b.
4. A candle is 49 cm tall and burns down 5 cm every hour. Write an equation for the amount y after x time periods, in the form y = mx + b.
5. A hiker is 5 km from camp and walks toward it at 4 km every hour. Write an equation for the amount y after x time periods, in the form y = mx + b.
6. A pool holds 33 L of water and a hose adds 2 L every minute. Write an equation for the amount y after x time periods, in the form y = mx + b.
7. A jar holds 12 coins and 2 more coins are added each week. Write an equation for the amount y after x time periods, in the form y = mx + b.
8. A jar holds 70 coins and 2 more coins are added each week. Write an equation for the amount y after x time periods, in the form y = mx + b.
9. A jar holds 35 coins and 3 more coins are added each week. Write an equation for the amount y after x time periods, in the form y = mx + b.
10. A jar holds 63 coins and 11 more coins are added each week. Write an equation for the amount y after x time periods, in the form y = mx + b.
11. A hiker is 70 km from camp and walks toward it at 6 km every hour. Write an equation for the amount y after x time periods, in the form y = mx + b.
12. A candle is 85 cm tall and burns down 3 cm every hour. Write an equation for the amount y after x time periods, in the form y = mx + b.
13. A jar holds 66 coins and 14 more coins are added each week. Write an equation for the amount y after x time periods, in the form y = mx + b.
14. A candle is 100 cm tall and burns down 16 cm every hour. Write an equation for the amount y after x time periods, in the form y = mx + b.
15. A pool holds 146 L of water and a hose adds 16 L every minute. Write an equation for the amount y after x time periods, in the form y = mx + b.
16. A candle is 79 cm tall and burns down 7 cm every hour. Write an equation for the amount y after x time periods, in the form y = mx + b.
17. A jar holds 167 coins and 8 more coins are added each week. Write an equation for the amount y after x time periods, in the form y = mx + b.
18. A candle is 141 cm tall and burns down 19 cm every hour. Write an equation for the amount y after x time periods, in the form y = mx + b.
19. A jar holds 75 coins and 3 more coins are added each week. Write an equation for the amount y after x time periods, in the form y = mx + b.
20. A pool holds 38 L of water and a hose adds 21 L every minute. Write an equation for the amount y after x time periods, in the form y = mx + b.