this is the answer hope it helps you
2+2+2x644x300
First, you need multiple,
2+2+1288x300
=2+2+386400
Then add together~
=386404
That's your answer lovely~
Answer: Our required linear equation would be 
Step-by-step explanation:
Since we have given that
Number of cups = 150
Cost = $20
Number of cups = 400
Cost = $45
Let x be the number of cups, y be the cost .
We will use "Equation of line using Two point slope":

Hence, our required linear equation would be 