Quiz Review: 2.1-2.3, 2.8

2.1

100

Determine whether the following is a function AND state the reason why or why not:

(-1,3), (0,3), (1,1), (1,0)

Not a function, x=1 repeats (same x values, different y values)

200

Determine whether the following is a function AND state the reason why or why not:

(0,5), (5,0), (2,5), (1,4)

Yes!

None of the x values repeat. 

300

Determine whether the following is a function AND state the reason why or why not:

(2,6), (7,8), (8,7), (2,8)

No, x=2 repeats (same x value with different y values. 

400

What is a set of ordered pairs called if they are NOT a function? 

Relation

500

A set of x values is called the ________, a set of y values is called the ________. 

Domain (x values), Range (y values)

2.2

100

What is the formula we use to find slope from a pair of points? 

m= (y₂-y₁)/(x₂-x₁)

200

Find the slope of the line through each pair of points.

(1,9), (-8,-15)

8/3

300

Find the slope of the line through the pair of points: 

(-13, -14), (7,4)

9/10

400

Find the slope of the line through the pair of points.

(-20,-12), (5, -12)

0

500

Find the slope of the line through the points.

(8,6), (8,2)

undefined 

2.3 Day 1

100

State the slope and y-intercept of the line.

y=(-1/4)x-5

m=-1/4, y-int: (0,-5)

200

State the slope and y-intercept of the line.

y=(3/4)x-4

m=3/4, y-int: (0,-4)

300

State the slope and y-intercept of the line.

y=-2x

m=-2/1, y-int: (0,0)

400

State the slope and y-intercept of the line.

x=4

m=undefined, no y-intercept

500

State the slope and y-intercept of the line.

y=5

m=0, y-int: (0,5)

2.3 Day 2

100

Find the x intercept and y intercept of the line.

x+y=4

x-int: (4,0)

y-int: (0,4)

200

Find the x intercept and y intercept of the line.

y=2

no x intercept

y-int: (0,2)

300

Find the x intercept and y intercept of the line.

4x-y=-4

x-intercept: (-1,0)

y-intercept: (0,4)

400

Find the x intercept and y intercept of the line.

4x-5y=20

x-intercept: (5,0)

y-intercept: (0,-4)

500

Find the x intercept and y intercept of the line.

3x+9y=-9

x intercept: (-3,0)

y intercept: (0,-1)

2.8

100

State the slope and y intercept of the linear inequality, then give a sketch of the graph (include a solid or dashed line, and what side would be shaded).

y>(-4/3)x+4

m=-4/3

y int: (0,4)

dashed, above

200

State the slope and y intercept of the linear inequality, then give a sketch of the graph (include a solid or dashed line, and what side would be shaded).

y_<5x

m=5/1

y int: (0,0)

solid, below

300

State the slope and y intercept of the linear inequality, then give a sketch of the graph (include a solid or dashed line, and what side would be shaded).

y<-x+3

m=-1/1

y int: (0,3)

dashed, below

400

State the slope and y intercept of the linear inequality, then give a sketch of the graph (include a solid or dashed line, and what side would be shaded).

x_> 2

m=undefined

y int: n/a

solid, right

500

State the slope and y intercept of the linear inequality, then give a sketch of the graph (include a solid or dashed line, and what side would be shaded).

y>7

m=0

y int: (0,7)

dashed, above