AI SL regression model
A tutoring centre models completion time by \(y=-5x+95\), where \(x\) is practice attempts and \(y\) is minutes needed. Find the gradient, intercept, prediction for \(x=9\), and direction.
Worked practice: regression model
State the regression line parameters, then substitute the x-value to predict y.
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.