JSFiddle - React, Tailwind, and code Playground

by Gwyn Milcote

HTML

<input type="radio" name="option" value="GDP" id="GDP_option" checked />GDP
<input type="radio" name="option" value="Population" id="Population_option" />Population
<input type="radio" name="option" value="None" id="None_option" /> None
<input type="button" value ="button" name="submit" id="submit" onclick="changeFormula()" />
<img src="https://beastkeeper.com/resources/pets/gryphon/a1_b4.png" name="formula" id="formula">

JavaScript

function changeFormula(){
     var formula = document.getElementById('formula')
     if(document.getElementById('GDP_option').checked)
        formula.src = "https://beastkeeper.com/resources/pets/gryphon/a1_b4.png";
     if(document.getElementById('Population_option').checked)
        formula.src = "https://beastkeeper.com/resources/pets/gryphon/a6_b5.png";
     if(document.getElementById('None_option').checked)
        formula.src = "https://beastkeeper.com/resources/pets/gryphon/a6_b4.png";
}