Answer:
Temperature is independent variable whereas, test performance is dependent.
Explanation:
Temperature is something that can be manipulated, and change in performance does not depend on the other hence it is independent. Test dependance is dependent because temperature depends test performance, and test performance cannot be manipulated.
Answer:
Choose a point on the graph to find the value of the derivative at. Draw a straight line tangent to the curve of the graph at this point. Take the slope of this line to find the value of the derivative at your chosen point on the graph.
Explanation:
The derivative measures the steepness of the graph of a function at some particular point on the graph. Thus, the derivative is a slope.