To solve this problem you must apply the proccedure shown below:
1. When you plot the given points, you obtain a trapezoid, therefore, you must apply the formula for calculate the area of a trapezoid, which is:
[tex] A=\frac{(B+b)h}{2} [/tex]
Where [tex] B [/tex] is the larger base, [tex] b [/tex] is the smaller base and [tex] h [/tex] is the height.
2. The dimensions are:
[tex] B=9units\\ b=7units\\ h=8units [/tex]
3. Substitute values:
[tex] \\A=\frac{(9 units+7units)(8units)}{2} A=64 units^{2} [/tex]
The answer is: [tex] 64 units^{2} [/tex]
