Chapter 2.3, Problem 59E

To determine

To Find: The prediction equation from the given data.

Answer to Problem 59E

Therequired equation is $y=0.29x+65.77$ .

Explanation of Solution

Given:

The given data is shown in Table 1.

Table1

Practice	15	75	60	45	90	60	30	120	10	120
Test Scores	68	97	92	3	95	83	77	98	65	94

Calculation:

Use the graphing calculator and press stat move to 1 next enter the data in $L_1$ and $L_2$ by the enter button as shown in Figure 1

  

Figure 1

Press the STAT+ move to CALC so that the second screen sot appears as shown in Figure 2

  

Figure 2

The line regression equation is obtained by pressing button 4 as shown in Figure 3

  

Figure 3