In this video I go through three exam questions on functions from the 2014 and 2015 Junior Cert.
Credits:
Kevin MacLeod: carefree
https://incompetech.com/

In this video we learn to find the minimum or maximum values of quadratic functions. If a parabola points up (like a letter u) the minimum is at the vertex. If a parabola points down (like an upside down) the maximum is at the vertex.