Math on the Mind

Plot the graph of y = 3x + 2 from the given table of values.

x y

-2 -4

-1 -1

0 2

1 5

2 8

Math on the Mind

Plot the graph of y = 3x + 2 from the given table of values.

x y

-2 -4

-1 -1

0 2

1 5

2 8

Creating a Table of Values

Algebra A

Unit 5, Lesson 2

y

x

Let’s graph y = 3x – 2

Make a Table of values

2

1

0

–1

–2

yx

y = 3(–2) – 2 = –8

y = 3(–1) – 2 = –5

y = 3(0) – 2 = –2

y = 3(2) – 2 = 4

y = 3(1) – 2 = 1

–8

–5

–2

1

4

www.chaoticgolf.com/pptlessons/graphinglinearequations.ppt

Quick Check

At a ball game they charge $2 for a hotdog. The

function C(h) = 2h describes the cost of h hotdogs.

Use the points for each input value.

h C(h) = 2h (h, C(h))

1 C(1) = 2(1) (1, 2)

2 C(2) = 2(2) (2, 4)

3 C(3) = 2(3) (3, 6)

4 C(4) = 2(4) (4, 8)

At the local video store you can rent a video game

for $3. It costs you $5 a month to operate your video

game player. The total monthly cost C(v) depends

on the number of video games v you rent. Use the

function rule C(v) = 5 + 3v to make a table of values

and a graph.

v C(v) = 5 + 3v (v, C(v))

0 C(0) = 5 + 3(0) (0, 5)

1 C(1) = 5 + 3(1) (1, 8)

2 C(2) = 5 + 3(2) (2, 11)

To recap:

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