INquiry regarding energy...
For the following question, the below response was concocted to fully answer the question: "How would your energy graphs look differently if the mass was 1 kg instead of 0.5 kg?" This will be discovered in the next paragraph with a claim and supporting evidence.
Solution to proposed issue...
Had the spring mass been a double amount of the original 0.5 weight, to 1.0 kilograms, the energy graphs will turn out differently. For example, implementing the kinetic energy formula onto it's graph will prove this statement as true. The first equation below this paragraph shows the equation for this (KE), displaying that kinetic energy is equal to one half mass times velocity squared. Because the mass has been doubled, this also means that the kinetic energy of this system doubles in tandem. The exact process applies to potential energy, as it's equation is the one at the bottom of the page (GPE) and so the potential energy doubles with it as the formula contains a variable for mass.
Equations utilized as proofs...
\[KE = \frac {1}{2} mv ^2\]
\[GPE = mgh\]