5
(Choose 1 answer)
(See picture)
A. Decrease 4.026 units
B. Increase 3.396 units
C. Decrease 6.791 units
* X Y
215
288 168
23
232 8
206 17
220
170 19
2178 24
242
227 11
236 7
D. Increase 6.791 units
A rocket motor is manufactured by bonding together two types of propellants,an igniter and a sustainer. The shear strength of the bond y is thought to be a linear function of the age of the propellant x when the motor is cast. Table below provides 10 observations:
What change in mean STRENGTH is expected when the AGE decreases by 2 units? Round to 3 decimal places.
