Parallel lines have the exact same slope ( or else they would eventually run into each other). So the answer is -1/2 is the slope.
My answer is 28.5 i believe i just added all of my numbers for the x variable and i divided it by by 6 because thats how many numbers you have
Answer:

Step-by-step explanation:
we know that
The equation of a exponential growth is equal to

where
a is the initial value
r is the rate of growth
x is the time in hours
y is the value of the quantity
we have

substitute


For x=22 hours
substitute

I’m pretty sure it’s b tell me if I’m wrong tho~~