maths functions: read below

Graph 4 in the figure to the right is the graph for a linear relationship y=ax+b.

b) Use the figure to determine the numbers a and b.

Graf 5 in the figure to the right is the graph of an exponential relationship y=b*1.20^(x).

c) Use the graf 4 to determine the number b.

The figure to the right shows the graph of an exponentially decreasing function.

a) Read the halving constant, T1/2, for the function.

b) and c) are about an exponentially growing function g(x). As can be seen from the table below, g(7)=12 and g(15)=24.

b) Determine the doubling constant of the function.

c) Fill in the blanks in the table (marked with question marks). You can write in the table below, but remember to explain the calculations