# data[].attributes.body
y(0)=1 y'(0)=-1

# data[].attributes.body
y(0)=1 and y'(0)=-1

# data[].attributes.body
y(1/2)=1/2

# data[].attributes.body
y'(1/2)=0

# data[].attributes.body
y(1/2)=y(0)+y'(0)(1/2-0)=1/2

# data[].attributes.body
y(1)=0

# data[].attributes.body
y(2)=9/8

# data[].attributes.body
y(1)=1/2

# data[].attributes.body
y'(1/2)=0

# data[].attributes.body
y(0)= 1 y'(0)= -1

# data[].attributes.body
1-(0.5) = 0.5

# data[].attributes.body
y'(1/2)= 0

# data[].attributes.body
y(2)=1

# data[].attributes.body
y(1)=1/2