the height of the poster must be multiplied by the ratio which is 1 to 2.5 which is 40 cm.
I hope this helps you
square one side a
Area=a.a
49=a.a
7.7=a.a
a=7
Perimeter=4a=4.7=28
Add it together, it should be 1,532,482 (I think)
(0,-5) is the y-intercept
