5. y=7x+9
6. y=9x+3
hope this helps
If<span> f′(x) > 0, then f is </span>increasing<span> on the interval, and </span>if<span> f′(x) < 0, then f is </span>decreasing<span> on the interval. This and other information may be used to show a reasonably accurate sketch of the graph of the </span>function<span>. Example 1: For f(x) = x </span>4<span> − 8 x </span>2<span> determine all intervals where f is </span>increasing<span> or </span>decreasing<span>.</span>
=(√10)^8 x (∛10)^8
=10^(8/2) x 10^(8/3)=4,641,588.834
