Area under a line
For \(f(x)=2x + 1\), find the antiderivative values at \(x=4\) and \(x=1\), then find the definite area.
Worked practice: area under a curve
Evaluate the antiderivative at the upper and lower bounds before subtracting.
Write a full answer
Now write the response in full, in your own words — this is what the exam asks for. The AI marks it on the same moves you built above (focus, evidence, technique, judgement) and gives feedback on reasoning, evidence, and expression.