Trying to figure out what went wrong with the way I solved this
So, a linear function is given. It's $g(x) = 10x + 5$
I know that $\frac{g(a+h) - g(a)}{(a+h) - a}$
I came up with $\frac{[10(a+h) +2] - [10a + 5]}{h}$
I then simplified that down and came up with 20, but apparently that's wrong?
What did I do wrong?
Edit: Ah, I forgot to say I'm trying to find the average rate of change of the function between $x = a$ and $x = a + h$.