Slope Y-Intercept Using Graphs and Tables

Which letter represents the y-intercept?

• y

• m

• x

• b

Write an equation for the table relating x and y in slope-intercept form.

• y = 2x + 2

• y = -3x + 2

• y = 6x + 5

• y = -2x - 2

What is the equation for the table above?

• y = -3x + 20

• y = 3x + 20

• y = -1/3x + 20

• y = 6x - 2

How would you write the equation with a slope of -3 and a y-intercept of 1

• y= -3x + 1

• y= -x - 3

• y= -3x - 1

• y= x + 3

Which is the graph of the equation y = -3x - 1?

*Hint: Use y-intercept and slope from the equation or you can make a table

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Answer explanation

y = -3x - 1

Table of values

x I y

-1 I 2

0 I -1

1 I -4

The slope is ​ ​ (a)   , and the y-intercept is ​ (b)   . The graph represents a ​ (c)   relationship.

• positive

• 4

• non-proportional

• negative

• proportional

• 0

• 2

• -4

i

h

g

a

f

e

18 months

(0, 13)

15/5

(5, 27)

(1, 15)

16 months

(6,30)

3

Match the table to the correct slope and y-intercept.

• 
• 
• 

The slope is ​ ​ ​ (a)   , and the y-intercept is ​ ​ (b)   . The graph represents a ​ (c)   relationship.

• negative

• 0

• proportional

• positive

• non-proportional

• 1

• -1

• 2

The slope is ​ ​ ​ (a)   , and the y-intercept is ​ (b)   . The graph represents a ​ (c)   relationship.

• negative

• 5

• non-proportional

• positive

• proportional

• -2

• 0

• 2.5