Maths p42 question

[Big Boi]

Guys,
For the gradient of the graph, what did u get??

Also,
What do u think the grade thresholds will be??

 

[christopher g]

The gradient of the graph?

 

[christopher g]

Guys,
For the gradient of the graph, what did u get??

Also,
What do u think the grade thresholds will be??

if u see justpastpapers.com, they wrote -12. I got -12 too during the test. I actually differentiated the equation to make sure my gradient was correct.

 

[Big Boi]

yeah when my teacher did it, he got -8.6. I got -9.1. I think the boundary will be -8.5 to -12