Download Unit 9B Quadratics Day 4

Unit 9B Quadratics Day 4
Take Initiative!
Do Now:
1. Take out both packets
2. Complete Warm up
Factored Form:
Vertex Form:
Why is it easy to write in both?
Learning Targets
roots
Unit 9B Quadratics Day 4
Day 4 Schedule
1. Warm­up
2. HW Questions
3. OYO's
4. In class problems
5. Worksheet #2
6. Homework: Review Video
OYO's
1.
x ­ ints: ( ___ , ___ ) & ( ___ , ___ )
vertex: ( ___ , ___ ) Factored Form: Vertex Form: 2. Write an equation of a parabola with x­ intercepts of ­5
and 1. Given the graph goes through (3, 4)
3. Write an equation for the parabola with vertex (­3, 8) which also goes through the point (­1, 2)
Unit 9B Quadratics Day 4
Write equation for parabola with vertex (3, ­4) and the point (8, 1). Why Vertex Form???
1. Write y = a(x )2 + ___ 2. Substitute (8, 1) in for x and y. 3. Solve Standard y = 3x2 ­ 2x + 5
Vertex Intercept
y = ­.5(x ­ 7)2 + 2
y = ­2(x ­ 5)(x + 5) y = x2 + 3x ­ 5
y = (x + 4)2 ­ 2
y = .25(x + 4)(x ­ 3) Unit 9B Quadratics Day 4
Using Intercept form to find the vertex
y = 2(x ­ 3)(x + 5) x-intercepts ( ___ , ___ )
& ( ___ , ___ )
y-intercept: ( ___ , ___ )
axis of symmetry: x = ___
Vertex: ( ___ , ___ )
Vertex Form:
Check on Graphing Calculator!
Using Intercept form to find the vertex
y = ­.5(x ­ 2)(x ­ 6) x-intercepts ( ___ , ___ )
& ( ___ , ___ )
y-intercept: ( ___ , ___ )
axis of symmetry: x = ___
Vertex: ( ___ , ___ )
Vertex Form:
Check on Graphing Calculator!
Unit 9B Quadratics Day 4
2
y = 2(x - 3) + 5
Form?
Opens up or down?
Max or Min
Vertex: ( ___ , ___ )
Axis of Symmetry: x = ___
y-intercept: ( ___ , ___ )
Sketch!!!
Mastery Work: Forms Worksheet #2
1
Together!!
Unit 9B Quadratics Day 4
Together!!
4
(­4,­2)
y­intercept ­1
Homework:
Benchmark Review Video
Finish Worksheet if not done
I can write a graph in factored or vertex form.
I can solve for a in a factored or vertex
equation.