Review!

Slope-Intercept Form

100

Slope = 4

y-intercept = -7

y=4x-7

200

Slope = 1/8

y-intercept = 24

y=1/8x+24

300

Line passes through; (1,12) and (0,9)

y=3x+9

400

Line passes through; (0,-7) and (8,-5)

y=1/4x-7

500

(0,-2) and (3,4)

y=2x-2

Point Slope Form

100

Slope = -3

Point = (9,2)

y-2=-3(x-9)

200

Slope = 8

Point = (6,2)

y-2=8(x-6)

300

(9,7) and (4,5)

y - 7 = 2/5 (x-9)

400

(-2,7) and (3,-5)

y-7=-12/5(x+2)

500

(-2,6) and (4,7)

y - 6 = 1/6 (x+2)

piece wise function

100

give the structure of the piece wise function 

         ________  ________

f(x)= ________  ________

         ________  ________

200

find the equation for the 2 flat lines 

4,2

300

Find the equation of the sloped line 

\frac{1}{3}x+2

400

give constrain of the two lines 

6<x

0\ge x

500

give constrain of the sloped line 

0<x\le6

Point-Slope form to Slope-Intercept Form

100

y-2=8(x-3)

y=8x-22

200

y+17=-3(x-1)

y=-3x-14

300

y-11=1/5(x-5)

y=1/5x+10

400

y+2=1/6(x-3)

y=1/6x-2.5

500

y+3=-5(x+13)

y=-5x-68

Word problem

100

problem 7: is a linear model suitable for this situation? 

yes because the prices are increasing linearly corresponding with the year 

200

Problem 7: If Susan were to try to write the equation in the for of y=mx b what would b represent ? discuss with context. 

B would represent how much the book costed in year 0ce 

300

problem 7 should you use point slope form or slope intercept form for this problem, after find the function for this problem

Your should use point slope form because as discussed in the previous problem b is not a reasonable number  that we can find. The equation is  y-1.2=0.05(x-2015)

400

Solve for x.

5x+3=7x-1

2

500

Terra bought 5 boxes of noodles, 7 jars of sauces, and 2 bags of cheese.  She paid a total of $45.50.  If each box of noodles cost $2.34 and each jar of sauce cost $3.54.  How much does one bag of cheese cost?

$4.51