Again for revision
total sa of triangular prism

144cm²

Step-by-step explanation:

Area of a triangle = 1/2 x base x height

6 x 8 = 48 / 2 = 24 cm² (area of the frontal side)

24 x 2 = 48 cm² (this is for both equal sides, so it is not necessary to multiply by 2)

The top side area:

Since it is a rectangle,

10 x 4 = 40cm²

Bottom side area:

8 x 4 = 32cm²

Back side area:

6 x 4 = 24cm²

40 + 32 + 48 = 120 cm² + 24 = 144 cm²

i believe that the answer is

b. y-1=-2(x-4)

hope this !