<p>Unit 5: Moving Straight Ahead Name ______</p><p>Hwk #6 – quiz review (Inv. 2.4)</p><p>1) The Arnold Family is considering changing phone plans. George gets information from three </p><p> different companies.</p><p> a) For each company, write an equation that shows how the total cost C </p><p> relates to the number of minutes x. </p><p>Moving Straight Ahead Homework #6 Verizon: ______</p><p>T- Mobil: ______</p><p>Sprint: ______</p><p> b) What information does the coefficient of x represent for each company? </p><p>Moving Straight Ahead Homework #6 c) For each company, what information does the y-intercept of the graph represent? </p><p> d) Suppose the Arnold family will need 500 minutes of talk time. What is the cost of each company? </p><p>Verizon: T-Mobile: Sprint:</p><p>Moving Straight Ahead Homework #6 e) Suppose the family has only $150 dollars to spend on a phone plan. For how many minutes could the </p><p> family talk according each plan? </p><p>Verizon: T-Mobile: Sprint:</p><p>Moving Straight Ahead Homework #6 2) The Ferry family decides to buy a new television on a payment plan. They’ve agreed to pay $15 per </p><p> month until the tv is paid off. Use the graph to answer the questions below.</p><p> a) How much did the Ferry family owe before they started making payments? </p><p>Explain. </p><p>Moving Straight Ahead Homework #6 b) Write an equation that represents the relationship between the amount the Ferry family still owes</p><p> and the number of months after the purchase. Explain what information the numbers and </p><p> variables represent. </p><p> c) After 7 months, how much money do they still owe. Explain how you got your answer. </p><p>Moving Straight Ahead Homework #6 d) You can see on the graph that the family will have the television paid off in 12 months. Show how </p><p> you could use your equation from part (b) to find this out how long before the family owes </p><p> nothing. </p><p>Moving Straight Ahead Homework #6 3) For the equation y = 5x + 2 answer the following questions.</p><p> a) What is the rate of change? </p><p> b) What is the y-intercept? </p><p> c) As the x value increases, what happens to the value of y? </p><p>Moving Straight Ahead Homework #6 d) List one pair of coordinates that would lie on the graph of this equation. </p><p>Moving Straight Ahead Homework #6</p>