<span>DE=EF hope I helped with your studies :)
</span>
First change them all into either fractions or decimals. Decimals are probably easier though. 1/5 = 0.2; 12/25 = 0.48; 4/5 = 0.8
Order: 0.2, 0.35, 0.48, 0.5, 0.8
Then you change the decimals that you converted back into the fraction form
Answer: 1/5, 0.35, 12/25, 0.5, 4/5
You have to set up a ratio and solve
You did the top right but the denominator is 0 so the slope in undefined or 0.
Hope this helps!
