Question

Walk-through needed

Answer 1

Do you know the slope formula from like Algebra 1?

Answer 2

Well, the slope of a line connecting two points is the average rate of change between those two points. Plug in x=-4 and 6 into the function. Then, use the slope formula to find the avg. rate of change on that interval.

Answer 3

Yes but what do you put at the top of the slope formula if the equation is as follows...

y2-y1/
6-(-4)=10

What would be at the top of the equation?

Answer 4

@iPwnBunnies

Answer 5

@iGreen

Answer 6

Plug in each x coordinate into the function. You'll get the y coordinate that goes with it

Answer 7

f(-4) = (-4)^2 + 2(-4) + 3 = ?
Do the same for 6. Plug the values into the slope formula in the right order.

Answer 8

Where'd the equation y=x^2+2x+3 come from? Isn't the slope formula y2-y1/x2-x1?

Answer 9

Yeah, but they give you the function you need to find the average rate of change on.

Answer 10

And the slope formula lets you find the rate of change.

Answer 11

Does y=5?

Answer 12

Nope, try again.

Answer 13

I mean are the solutions 51 and 5?

Answer 14

What do you mean? :3

Answer 15

I plugged in both -4 and 6 into the equation and that's what I got.

Answer 16

OH. Yeah, so you got coordinates (6,51) and (-4,5). Use slope formula to find the slope of the line connecting the two points. That will be your avg. rate of change.

Answer 17

I got 4.6 but that's not an answer choice

Answer 18

OH, I found the problem. Try plugging in -4 in for x again. Y doesn't equal 5.

Answer 19

(-4,11)?

Answer 20

Mhm c:

Answer 21

So my answer is 4?

Answer 22

Yas c::

Answer 23

Thank you!