Answer:

Step-by-step explanation:

Differentiate:

Substitute
into
:

Therefore, 68 is the gradient of the tangent line at x=7:

when
, 


Answer:
Where is it?
Step-by-step explanation:
Answer:
-0.4
I am pretty sure
Step-by-step explanation:
Answer:
see below
Step-by-step explanation:
3y=6-2x and then
y=2-2/3x