Answer:
b=2/3
Step-by-step explanation:
The table is given as:

The exponential function is given in the form

where a is the initial value and b is the multiplicative rate of change
When x=1, y=9, we have:

When x=3, y=4, we have:

Dividing the two equations:

The multiplicative rate of change, b is 2/3.
the first one is true and the second one is false
64 cm is 640 mm.
Hope this helps!
2x + 5y = - 5 is the answer. I m very expert in maths . So ask me your doubt. I can help