please show work
Find the average rate of change for the given function on the given interval.
3. f(x)=x2-4x; -2 ≤x≤ 4 4. f(x)=2x-1; [0, 3]
Find a Point-Slope equation for a line containing the given point and having the given slope.
9. (-7, 2), m = 3 10. (6, -2), m = -3
Find the x- and y-intercepts of the graph of each equation.
11. 5x – 4y = - 12 12. -2x + 7y = 11
Find the x- and y- intercepts of the graphs passing through the given points.
13. (4, -2) and (5, -4)
14. (-3, 2) and (-4, 10)
These are cookbook problems and I see no effort by you to follow the recipes so I have no idea why you are having trouble with them.
I have no idea how to do any of these and what I thought was right isn't the correct answer given in the answer key
well, look at number 4 for example
the average rate is the total change in f divided by the change in x
at end = 2*3 - 1 = 5
at begin = 2*0-1 = -1
so change in f= 5 -(-1) = 6
and
change in x = 3-0 = 3
so av rate = 6/3 = 2
no ones like number 13
Find the x- and y- intercepts of the graphs passing through the given points.
13. (4, -2) and (5, -4)
we need the equation of the line through those points
what is the slope m?
m = (-4 - -2)/(5-4) = -2/1 = -2
so
y = -2 x + b
what is b? to find it put a point in like
(5 , -4)
-4 = -2(5) + b
10-4 = b = 6
so it is
y = -2 x +6
What is the x axis intercept where y = 0?
0 = -2x+6
x = 3
What is the y axis intercept where x = 0?
y = +6
done
thanks this helped me a lot especially on some other problems
You are welcome.
Lesson 4: Understanding Slope
Algebra Readiness (Pre-Algebra) B Unit 1: Functions
Quick Check:
1. C (-2)
2. C (-1)
3. A (2/3 or you could say 2 over 3)
4. B (1)
5. D (3)
These answers will give you a 5/5 100%
Remember the teachers can change the order of the questions or the questions in general, or they could change the answers.
But as of right now (1/29/2019 Tuesday), these answers are correct!
From your fellow Connexus/Connections Academy User! =)
Have a nice day or night! <3