Answer:
y=1.8x+219; 309
Step-by-step explanation:
I backsolved this problem. This means that I plugged in the x value into each of the given equations to see if the returned y value matched the table. I then repeated this with the next set to make sure it was a trend and not a one time match.
Since the equation y=1.8x+219 matched I then substituted the x value 50 into the equation to get y=309
