ShmoopTube

Where Monty Python meets your 10th grade teacher.

Search Thousands of Shmoop Videos


Coordinate Geometry Videos 26 videos

Inequalities in Number Lines
3229 Views

ACT Math: Coordinate Geometry Drill 1, Problem 1. Which inequality is expressed by the number line?

Parallel Lines
257 Views

ACT Math: Coordinate Geometry Drill 3, Problem 5. What is the slope of a line parallel to one with the given equation?

ACT Math 1.2 Coordinate Geometry
252 Views

ACT Math: Coordinate Geometry Drill 1, Problem 2. Solve the inequality and determine which solution is shown on the number line.

See All

ACT Math 2.1 Coordinate Geometry 246 Views


Share It!


Description:

ACT Math: Coordinate Geometry Drill 2, Problem 1. The number line shows which expression?

Language:
English Language

Transcript

00:02

Here's your shmoop du jour...

00:04

The number line shows which expression? And here are your potential answers...

00:10

OK, so we note 2 very important things right off the bat - there are open circles,

00:14

at the points negative 2 and positive 4.

00:17

Those open circles mean that the line can be greater

00:20

than or less than but not equal to...

00:23

So right away we can see that A and C are going to be raccoon food.

00:28

Let's brute force the rest... we'll take a look at E and work our way up.

00:32

Here, x is GREATER than negative 4... but already we're in foul territory because the

00:36

line here doesn't connect or tie in with negative 4 at all...

00:39

...it just crosses over it... so we can quickly toss E. On to D.

00:44

Here x is bigger than negative 2... which also doesn't work.

00:47

The line shown is LOWER or more negative than negative 2, not bigger. So we can toss D.

00:54

Last chance is B... which ... works!

00:57

X is smaller or more negative than negative 2 and not equal to it here - check;

01:02

...and x is greater than but not equal to positive 4 here - check.

01:07

B is our answer. Done.

Related Videos

ACT Math 3.1 Plane Geometry
2559 Views

ACT Math: Plane Geometry Drill 3, Problem 1. What is the area of the trapezoid shape in the video?

Inequalities in Number Lines
3229 Views

ACT Math: Coordinate Geometry Drill 1, Problem 1. Which inequality is expressed by the number line?

ACT Math 3.1 Intermediate Algebra
1955 Views

ACT Math: Intermediate Algebra: Drill 3, Problem 1. Find the fifth number in the series.

Surface Area of Cylinders
14741 Views

Haven't you always wondered how much cardboard it takes to encase a trunk warmer for your pet elephant?

Perimeter of Irregular Shapes
4864 Views

Want to figure out the area and perimeter of irregular shapes? Break them down into regular shapes. For example, a flower can be broken down into s...