I’ve got the last one but need help on the first part

The change per minute is 33 liters.
33 liters of water is added every minute.
Answer:
a) +33
b)300
Step-by-step explanation:
The given equation is
[tex]300+33x=y[/tex].
The change per minute in the amount of water in the pond is the slope of the line which is [tex]+33[/tex] liters.
The starting amount of water of water in the pond is the y-intercept which 300 liters