You sign up for an unlimited text-messaging plan for your cell phone. The equation y=20 represents the cost y (in dollars) for sending x text messages. Graph the equation
Your Q is missing something..... is that SUPPOSED to be y = 20 x ???
Here is a graph of y = 20
https://www.desmos.com/calculator/qgdd7pe1ab
Here is a graph of y = 20x
https://www.desmos.com/calculator/myz9mbyjc6