Atriangle with vertices at  a(0, 0),  b(0, 4), and  c(6, 0) is dilated to yield a triangle with vertices at  a′(0, 0),  b′(0, 10), and  c′(15, 0). the origin is the center of dilation. what is the scale factor of the dilation?

none of the above.

for one of the equations to be used in the process, there has to be a term in the equation since squared is .

since there is only a term in the first equation, we cannot derive a from completing the square.

solving with completing the square

if x = 1, then the answer is 3.5