You could substitute with 6 for x+9 and 9 for x+6 , otherwise it be 0=-3 or no solution
It's the slope of the secant line to <em>f(x)</em> through the points (-3, <em>f</em> (-3)) and (9, <em>f</em> (9)),

Answer:
-7.5 also as -7 1/2
Step-by-step explanation:
Answer:19.42 is the answer
Step-by-step explanation: