Let x be the dilation factor, then we can write
[tex]28x=35[/tex]
If we move 28 to the right hand side, we get
[tex]\begin{gathered} x=\frac{35}{28}=\frac{7\cdot5}{7\cdot4} \\ \text{then} \\ x=\frac{5}{4} \end{gathered}[/tex]
therefore, the answer is option D
