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# Length of Curve Between Points

APCALC-BNL1IB

Determine which expression could represent the length of the curve $y = x^2 – 1$ from the point $(-1, 0)$ to $(3, 8)$.

I. $\ \int _{ -1 }^{ 3 }{ \sqrt { 1+4{ x }^{ 2 } } dx }$

II. $\ \int _{ 0 }^{ 8 }{ \sqrt { 1+\cfrac { 1 }{ 4y+4 } } } dy$

III. $\ \int _{ -1 }^{ 3 }{ \sqrt { 1+2x } dx }$

A

I only.

B

II only.

C

I and III only.

D

I and II only.