I'm familiar with that graph, and it is very effective.
To go back to the B.C. example, from 2012 to 2016 the carbon price was frozen. That also had an impact on whether emissions were rising.
A well-priced carbon price that increases predictably over time is going to be the most effective instrument in reducing emissions, as well as offering the policy and price certainty that businesses are looking for and consumers are looking for.