Roxie’s Photo
Assessment Task
Roxie is a dog that loves to be
photographed. Here is her picture.
Pictures can be enlarged or reduced
in size. When you change the size of
this photo make sure the image is
proportional, otherwise Roxie will
look distorted. 24 cm 14 cm 1. If you double the length of one side, will the photo be proportional or
distorted?
––––––––––––––––––––––––––
Explain how you know.
2. If you increase both the length and the width of the photo by 4 centimeters,
will the picture be proportional or distorted?
––––––––––––––––––––––––––
Explain how you know.
Performance Task
Roxie’s Photo Test 7
P 7 © Silicon Valley Mathematics Initiative 2013. To reproduce this document, permission must be granted by the
SVMI [email protected]
3. If you divide both the length and the width of the photo by 3, will the picture
be proportional or distorted?
––––––––––––––––––––––––––
Explain how you know.
4. The length by width of Roxie’s photo is 24 cm long by 14 cm wide. In order
to make a photo that will fit into a wallet, the photo needs to be reduced to a
length of 7 cm. Determine the width of the wallet size photo.
–––––––––––––– cm
Show how you figured it out.
Performance Task
8 Roxie’s Photo Test 7
P 8 © Silicon Valley Mathematics Initiative 2013. To reproduce this document, permission must be granted by the
SVMI [email protected]