DL-LR-MATHS

Which variable in the equation y=mx+c is dependent?

• x

• m

• c

• y

What is the formula for the error of a single data point?

• (y_actual​ − y_predicted​)²

• y_actual​ − y_predicted​

• y_predicted​−y_actual​

• y_actual​ + y_predicted​

In business terms, what does the intercept represent?

• Marginal change

• The total error

• Baseline value of the dependent variable when predictors are zero

• None of the above

What does the slope of the regression line indicate?

• How much y changes for a unit change in x?

• The total error of the model

• The direction of the line

• The starting value of yyy

What is the most commonly used cost function in linear regression?

• Mean Absolute Error (MAE)

• Mean Squared Error (MSE)

• R-squared

• Root Mean Squared Error (RMSE)

What does RMSE stand for?

• Relative Mean Squared Error

• Regression Mean Squared Error

• Root Mean Squared Error

• Residual Mean Squared Error

Which scenario indicates underfitting?

• High training error and high test error

• Low training error and high test error

• Low training error and low test error

• None

How does high bias affect a model?

• It generalizes well to new data

• It overfits the data

• It underfits the data

• None of the above

What happens when the learning rate in gradient descent is too small?

• The model converges too quickly

• The model does not converge at all

• The model converges slowly

• None of the above

Which cost function penalizes larger errors more heavily?

• MAE

• MSE

• RMSE

• R-squared