What is the area of the shaded triangle

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

The table represents a function f(x). what is f(3)? a.-9 b.-1 c.1 d.9

How does a low unemployment rate affect a nation's economy? a. the nation has a higher number of productive resources. b. the nation can spend more money on for unemployed people. c. the nation can save money by paying lower salaries to a large workforce. reset