# More about linear function

#### Now we are going to learn some advance linear functions.

#### y=mx+b is the format of a linear function.

#### "b" is the Y intercept point.A Y intercept is the point that locates right on the Y axis and it has a major property,which is when X=0,the output of a linear function is always the term "b" which is the y intercept.Like the following examples:

#### They have differnt "b",so their positions are not the same.

#### But they have the same propety,Which is they are all pointting at the same direction.Now we are going to take a close look at their "m" terms.They all share the same "m" term.It is the slope,slope is used to describe the steepness, incline, gradient, or grade of a straight line.That's why they point at the same direction.Let's see the examples below.

#### See?Now they are pointing at differnt directions because the slopes are different.

#### Isn't that so interesting?

#### I bet you are exciting,so let's do some practises.

#### Graph the following functions:

#### 1.y=2x+5

#### 2.y=-3x-2

#### 3.2y=2X-1

#### See if you come up with these graphs:

#### 1.

#### 2.

#### 3.