Finding the Zero of a Function on a Graph

If the graph of a quadratic does not intercept the x axis at any point, then it has:

• Real Solution

• Real Solutions

• Half a Solution

• No Real Solution

Use the graph to determine the solutions.

• -1 and -3

• 1 and -3

• 1 and 3

• -1 and 3

What is another word for zeros?

• y-intercepts

• roots

• vertex

• axis of symmetry

• -2, 4
• -8
• ±8
• No real solution

• -6, -2
• -2, 6
• 2, 6
• -6, 2

^{What is the x- intercept of the line?}

• (1, 0)

• (2, 0)

• ( -1, 0)

• (-2, 0)

What are the x- and y- intercepts, respectively, on this graph?

• (0,5), (0,5)

• (5,0), (5,0)

• (5,0), (0,5)

• (0,0), (5,0)

From the equation y = 3x + 18,  what is the value of the x-intercept?

• -6

• 6

• 18

• 3

True or false:
The x-intercept of a function ALWAYS occurs where y is equal to zero.

• True

• False

How do you find the x-intercept?

• replace all x-values with 0

• replace the y-value with 0 or make the numerator equal 0

• set denominator equal to 0

• compare the degrees of the numerator and denominator