Figure 1 and figure 2 are right triangles.

two right triangles labeled figure 1 and figure 2, where the legs of figure 1 are 3 units long and the legs of figure 2 are 7 units long

What scale factor was used to produce Figure 2 from Figure 1?

A) 7 over 3
B) 3 over 7
C) 7
D) 3