4.1 A formula for slope

4.1 A formula for slope

Learning Targets

•learn how to calculate the slope of a line given twopoints on the line

● determine whether a point lies on the same line astwo given points

● find a point on a line given a known point on the lineand the slope

Warm Up

•Hector recently signed up with a limited usageinternet provider. There is a flat monthly charge andan hourly rate for the number of hours he isconnected during the month. The table shows theamount of time he spent using the internet for thefirst three months and the total fee he was charged.

•A. Graph the situation

•B. based on the graph

Find the slope

Slope formula

Find the slope of the graph

1. Consider the line through thepoints (1,7) and (6,4). Find theslope of the line

2. Consider The line through (-2,3)and (4,-1)Find the slope of the line

3. Given the slope is (1,7) (6,4)

•A. Without graphing, verify that the point(4,5.2) is also on that line

•B. find the coordinates of another point onthe same line.

4.

Homework

•Pg 220 #1,2,3,6,7,8

4.1 Day 2 Warm Up

• Write the equation of the line given the twopoints. Then find a third point that the linewould go through.

•A. (12, -8) and (-20, 0)

•B. (5, 9) and (1, -3)

Horizontal Slopes

Vertical Slope

1. Find the Slope of the Table Below

2. Find the Slope of the Table Below

5. Given one point on a line and theslope of the line name two otherpoints on the line. Then check yourwork

•a. (3,2) slope 2/5

•B. (5,3) slope 0

•C. (-4,2) slope -2

•D. (-1,2) slope -1.25

Exit Slip

Group work if extra time

Homework

•Pg 220

•#5,8,9,10,11 a,b