Year 9

# Sketching quadratic graphs (Part 2)

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## Lesson details

### Key learning points

- In this lesson, we will use the shape, roots and y-intercept to sketch the graph.

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### 5 Questions

Q1.

What are the roots of the quadratic equation?

x = -1.5

x = 2 and x = -4.5

x= -10

Q2.

What is the y-intercept of the quadratic equation?

(-10,0)

(0,-10)

(10,0)

Q3.

What is the y-intercept?

(0,-36)

(0,-6)

(0,6)

Q4.

What are the roots of this equation?

x = -4 and x = -9

x = 6

x= 4 and x = 9

Q5.

What are the roots of this equation?

x = -4 and x = -10

x = 4 and x = 10

x= 5 and x = 9

### 5 Questions

Q1.

What are the roots of this graph

Others

x = -8

x = 2 and x = -4

Q2.

What is the y-intercept?

y = -2

y = -4

Q3.

What is the equation of this graph?

B

C

D

Q4.

Which graphs shows y = x^2 + 6x + 8

g (blue)

Q5.

Which line is correct?

roots are x=0 and x = -81, y intercept is 0

roots are x=0 and x = 81, y intercept is 81

roots are x=9 and x = -9, y intercept is 81