Quadratic Equation and Their Intro

When I want to find the maximum or minimum height of an object, I should_____

• Look at the x intercepts

• Look at the axis of symmetry

• Look at the y intercept

• Look at the y-coordinate for the vertex

• Look at the x-coordinate for the vertex

Which of the following mean the same as x-intercept? (More than one answer! Select all that are correct)

• Zero

• Root

• Axis of Symmetry

• Solution

• Maximum

Which one are we looking for?

Elliot wants to know how high the soccer ball will get if he kicks it straight up in the air.

• x at vertex

• y at vertex

• zeros/roots/x intercepts

• y-intercept

Which one are we looking for?

Isabella wants to know how long her toy rocket will be in the air after she lights the fuse to launch it from a 1.5-foot launch pad.

• x at vertex

• y at vertex

• zeros/roots/x intercepts

• y-intercept

An equation that can be written in the form y = ax² + bx + c

• Quadratic equation

• MInimum

• Linear equation

• Maximum

Tags

CCSS.8.EE.C.7B

Select the solutions to the equation

4x² + 11x + 7 = 0

• x = - 1.75

• x = 6

• x = - 1

• x = 1

What are the solutions for this quadratic equation?

• -4 and 0

• 4 and 0

• -2 and 4

• -2 and -4

Which of the following equations matches standard form of a quadratic?

• ax + by = c

• y = a(x - h)² + k

• y = ax² + bx + c

• y = mx + b

The quadratic function y = -2x² + 4x + 6 is pictured. What are the solutions to the equation 7.5 = -2x² + 4x + 6?

• x = 0.5

• x = 1.5

• x = 1

• x = 8

• x = 6

3x² - 4 is a quadratic

• true

• false