Question

What are the extrema of g(x)=5x−80? on the interval [−1,10]?

Answer 1

$\frac{dg}{dx} = 5 > 0$

g(x) is increasing

hence min.g(x)=g(-1)

=-5-80=-85

& max.g(x)=g(10)

=50-80

=-30