Equations of motion — practice question

Which equation for uniformly accelerated motion can be obtained using only the gradient of a velocity-time graph?

• A$s = \frac{1}{2}(u + v)t$
• B$s = ut + \frac{1}{2}at^2$
• C$v = u + at$
• D$v^2 = u^2 + 2as$