Tuesday, February 4th Bell Ringer: What type of correlation do you see in this graph? How do you know?

Bell Ringer Review + HW Check

HW tracker How are we doing

Objective: I CAN write the equation of a trend line and use that to make predictions Homework: Complete the back of the sheet

POSITIVE NEGATIVE NO

bbbbb

City Code Time in Minutes Cost Distance Baltimore BWI 105 141 605 Oakland OAK 280 184 1848 Boston BOS 125 104 849 Indianapolis IND 50 89 165 Denver DEN 160 134 918 Las Vegas LAS 235 210 1526 Detroit DTW 65 237 Minneapolis MSP 85 355 LA LAX 270 185 1744 Little Rock LIT 100 153 554 New York LGA 111 711 Ft Luad. FLL 192 1170 New Orls MSY 135 180 835 Salt lake SLC 205 172 1258 Wash DC IAD 115 594 San Ant SAT 170 129 1054 San Fran SFO 290 1856 Raleigh RDU 110 119 642 San Diego SAN 265 189 1733 Cleveland CLE 70 307

Now let’s look at the airline data from yesterday

Writing for math Conclusion from the graph What type of correlation do you see? As the distance of a flight increases, the time of the flight increases Positive

Let’s draw a trend line (1864, 290) (307, 70)

Write the equation (1864, 290) (307, 70)

(1864, 290) (307, 70)

Now what do the slope and y intercept mean represents the rate of change. Y intercept: represents the value of y when x is 0

Let’s draw a trend line (1864, 290) (307, 70)

Answer these questions with your partner What does the slope represent? What does y – intercept mean? Predict how long an 2000 mile flight would be? The number of minutes it takes to fly 1 mile How long it takes to fly 0 miles ????

Now let’s draw a line of fit for the cost vs distance scatter plot (1864, 290) (307, 70)

Answer these questions with your partner What does the slope represent? What does y – intercept mean? Predict how much it will cost to fly to Miami (1190 miles from Chicago)? The cost per mile How much it costs to fly 0 miles ????

Try to write the trend line on your own