leb report 7 execution

w=0.5
delta w= 0.001
x_0= 0.3
delta x_0=0.003

all these information was given in the lab manual~

i'm having a problem with maple TA accepting the values i put in for the force in part 1. for the force i did m*g. my mass is in kg and g is 9.81. i put in the values
1.177
1.373
1.570
1.177 so i the significant figures isn't the problem. my slopes were correct except for the first one.
im not sure wuat i didnt wrong?

How do we calculate T? We need to use it to calculate Delta_T. It says T=constant * k^-0.5. What is the constant?