For each function, choose the correct description of its graph. 

Suppose that the functions f and h are defined for all real numbers x as follows.    Write the expressions for the following. Simplify your answers.  (a) [addition] (b) [subtraction] (c)  [multiplication]

Which machine learning model uses the ‘kernel trick’, which maps non-linear data into higher dimensions in order to more easily separate it?

Given the right triangle shown, find  

A passenger train traveled 120 miles in the same amount of time it took a freight train to travel 70 miles. The rate of the freight train was 30 miles per hour slower than the rate of the passenger train. Find the rate of the passenger train. 

In the context of imbalanced data, which metric is more informative than accuracy?

What is the purpose of clustering in financial text analysis?

Find the domain of the function.  Write your answer in interval notation or as an inequality. Use the Equatio button (blue diamond) or the equation tool,  (you may need to click the 3 vertical dots to find the icon). 

Answer the questions below about the quadratic function.

Which of the following is NOT a limitation of k-means clustering?