0, the slope and y-intercept is 0
Let point A be
and point B 

Use the point-slope formula and whichever point you want as , in this case I'll use

Answer:
(4 x 3) x 2=
=12 x 2
=24
Step-by-step explanation:
The answer is30 cubic inches
The original expression evaluates to 54.4 as shown in the first working.
_____
For some reason, 3.4 got transcribed to be 1.7 in the 3rd line of the second working. There is no math operation in the expression that requires 3.4 to be divided by 2.