I see. Imagine you have f(x)=|x|. It's a V shaped graph.
Now if f(x)=|x|, 2f(x)=2|x|.
Graph Transformation Rule:
af(x), multiply y-coordinates by a.
*Ultimately, you'd still have a V shaped graph in 2f(x)=2|x|, but the y values of all the coordinates in f(x)=|x| would have to be multiplied by 2 giving you 2f(x)=2|x|.
If he travels 12km/h for 3 hours then he went 36km in 3hr. The answer is 36km.
0.9x12=10.8,, 10.8-6.3=4.5. The number is 12
I believe that the a value is 2