Help ???
The table and scatter plot shows the time spent studying...

Time spent in     Observed              Predicted                               Residual

studying (x)      midterm score   midterm score

12                            70                           60.5                                        9.5

18                             75                            83.34                                     -8.34

Step-by-step explanation:

Given, The equation of the line of best fit: (which gives the predicted score.)

Time spent in studying of 12 hours i.e. at x=12, observed y= 70

Predicted y =

Residual =Observed y - predicted y

= 70-60.5

= 9.5

Time spent in studying of 18 hours  i.e. at x=18, observed y= 75

Predicted y =

Residual = Observed y - predicted y

= 75-83.34

= -8.34

Time spent in     Observed              Predicted                               Residual

studying (x)      midterm score   midterm score

12                            70                           60.5                                        9.5

18                             75                            83.34                                     -8.34

2 pecks

step-by-step explanation:

1) the property is   ixi = a ⇔x = a   o x = -a

4(x-5)+3= 15⇒4x-20+3 = 15⇒4x-17= 15⇒4x = 15+17⇒4x = 32⇒x =32/4= 8

4(x-5) +3= -15⇒4x-20 +3 = -15⇒4x-17= -15⇒4x =-15+17⇒4x = 2⇒x =2/4= 1/2

the values are x =8 and x = 0,5