Bellwork

1) 2) 3)

Simplify the fraction

4) Simplify: 4) Simplify: 2 (a + 3b) - 4 (3a - b) - (5a + 4b) )

3-5 6-0 -1 - 2 -6 - (-4) 0-1 1-0

Objectives: IWBAT demonstrate a thorough understanding of the coordinate system. IWBAT plot points and label points on the system.

1. quadrants 2. origin 3. ordered pair 4. plot points 5. find coordinates

x tells R or L y tells up or down

Cost of staying at a hotel

Rate of Change

Change in cost Change in # of days

Finding rate of change using graphs

Days

Tota

l C

ost

($

) Cost of hotel over time

vertical change

horizontal change

Which section of the ski slope is steepest?

Hittin' th

e

slo

pes

How do you know?

Slope Slope rise run

vertical change

horizontal change

Bellwork

What quadrant is the point in? B) C) D)

C? D?

Objective: IWBAT find slope using points on a graph and using the point-slope formula.

slope = m =

slope = m =

rise run

y - y x - x

m =

Finding slope using points

2 1

1 2 =

Bellwork

Find the slope of L1 through L5.

Now that we know some slope basics, let's go back to the ski slope problem, and start by putting it on the coordinate plane.

X

Y m =

m =

m =

m =