One of the many ways to solve the area of a triangle is to divided by two the product of its base (b) and height (h). Which can be expressed as,
A = (b x h) / 2
Substituting the given base and height to the equation,
A = (5.4 cm x 2 cm) / 2 = 5.4 cm^2
Therefore, the area of the triangle is 5.4 cm^2.
Simply plug it into the equation
y=mx+b or -4=-5/6(8)+b
Now just tie up loose ends and your equation will be
y=-5/6x+8/3
