What is the rate of change of the equation x - 2y = 4

step-by-step explanation:

once you graph it hit 2nd (the blue button) and graph

that takes you to a table of coordinates

on the left is x coordinates and on the right is y coordinates and an empty box

(you may have to scroll up/down in order to get ( x, 0)

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225

so, converting firstly the mixed fractions to improper fractions and then "adding".