52 (if id means is and not imaginary number)
Answer: -2
Step-by-step explanation:
The equation of a line in slope - intercept form is given as :

where m is the slope and c is the y - intercept.
Equation given :

⇒ 
add 9 to both sides , we have


comparing with :

slope = -2
Answer:
Rs 104z
Step-by-step explanation:
litres cost Rs 4z
1litre cost Rs 4z×4 =16z
⇒
⇒6.5 litres cost Rs 16z×6.5 =Rs 104z