Alg1 7.5 Slope

Algebra 1

Lesson 7.4 Slope

Review: basics

x-axis, y-axis

ordered pair (x,y)

+, -

Table Discussion

SLOPE

Lombard Street

San Francisco, CA

Which line describes the following slopes:positive, negative, undefined, zero

1 2 3 4 5 6 7 8 9-1 -2-3-4-5-6-7-8-9

1 2345678

9

-10 10

10

-1 -2

-3-4

-5-6-7-8-9

-10

Line 1

Line 2

Line 3

Line 4

Slope: steepness of a line

rise

run

vertical change

horizontal change= =

positive negative

zero undefined

How do you find the slope bewteen 2 points?

SMOTD

1) measure the vertical (rise) and horizontal(run) distance between 2 points

2) use slope formula

rise

run=

find the slope:

rise

run=

find the slope:

Do #1 on your worksheet

Slope formula:

m = y2 - y1x2 - x1

rise

run

vertical change

horizontal change= =

Slope Formula Lyrics

I'm gonna find the slope

'cuz I got the formula in my pocket

m equals y2 minus y1 over

x2 minus x1

m = y2 - y1x2 - x1

(1,9)

(0,0)

(-1,-9)