A cell phone plan costs $200 to start. Then there is a $50 charge per month. What is the total cost (start up fee and monthly charge) to use the cell phone plan for 1 month? Write just a number.

How many months were you on the plan if you spent $400? Write just a number.
What is the coordinate for the y-intercept? Write something like (x, y) without any spaces, and substitute the correct numbers for x and y.

What equation describes this situation? Do not write any spaces. Write it in the form y=mx+b and substitute the correct numbers for m and b.

Is there a proportional relationship between time and the cost of the cell phone plan? Write either Yes or No