Roots and Turning Points : Theory

• • The y-intercept tells us where the line / curve cross the y axis 
  • The turning point is where the gradient on side is positive, and the gradient on the other side is negative
  • The turning point is always written as a coordinate 
  • The roots of a quadratic are the values of x that make the quadratic = 0 
  • The roots of a quadratic are where the quadratic graph crosses the x axis  
  • When writing roots, we only write down the x value of the coordinate