rate of reaction - using tangents to determine rate

Question 1

curve of graph constantly changing =

Answer 1

constant changing of rate

Question 2

steeper tangent =

Answer 2

faster reaction

Question 3

how to use a tangent?

Answer 3

1. On the line draw a tangent touching the line at one point
2. pick two points and draw 2 lines so they meet at a rectangle
3. then find the difference in width and height
4. do height divided by width (x/y)