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PART A
While building his catapult, Aiden tested several different designs. He varied the arm length of his catapult and recorded the horizontal distance between where the ball was launched and where it landed for each arm length.

( left side of table ) Length of Catapult Arm (cm)

(Right side of table ) horazontal distance (cm)

60 | 320
80. |. 352.4
100 | 386.8
60. |. 288.1
70 |. 315
75 |. 322
90. |. 362
100. | 390
85. | 350
95. | 398


The table presents Aiden’s data showing the length of the catapult arm in relation to the horizontal distance the catapult launched the tennis ball. What is the equation of the line of best fit for Aiden’s data?

Enter the correct answer in the box by replacing m and b in the equation. Round each number to the nearest tenth.

Y = mx + b