Graphing y = mx + b

From the equation: y = -2x + 6 what is the slope of the line?

• y

• 6

• x

• -2

Answer explanation

y = mx + b

m = slope

b = y-intercept

So...

y = -2x + 6

m = -2

Tags

CCSS.8.EE.B.5

From the equation: y = -2x+6 what is the y-intercept of the line?

• y

• 6

• x

• -2

Answer explanation

y = mx + b

m = slope

b = y-intercept

So...

y = -2x + 6

b = 6

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

What is the y-intercept?

• (5, 0)

• (-5, 0)

• (0, 5)

• (0, -5)

Answer explanation

The y-intercept is where the graph crosses the y-axis.

Here the graph crosses the y-axis at (0, 5)

Tags

CCSS.HSA.CED.A.2

CCSS.HSA.REI.D.10

CCSS.HSS.ID.C.7

Write the equation for the line in slope-intercept form.

• y= -1x + 3

• y= 4x + 3

• y= -4x + 3

Answer explanation

y - intercept is (0,3), so your equation has to end in +3

The slope is positive

From the y-intercept you move down -4 and left -1

-4/-1 = 4

So

y = 4x + 3

Tags

CCSS.HSA.CED.A.2

CCSS.HSA.REI.D.10

Which equation represents this graph?

Answer explanation

y - intercept is -3 so your equation has to end in -3

Slope - move up 5 and left -1

So sope is 5/-1 or -5/1

y = -5x - 3

Tags

CCSS.HSA.CED.A.2

CCSS.HSA.REI.D.10

Write the equation of the graph

Tags

CCSS.HSA.CED.A.2

CCSS.HSA.REI.D.10

• 
• 
• 
• 

Answer explanation

You want a y-intercept of -1

Positive slope of 4

Move: up 4 and right 1 or down -4 and left -1

Tags

CCSS.HSA.CED.A.2

CCSS.HSA.REI.D.10

CCSS.HSF.IF.B.4

CCSS.HSF.IF.C.7

Write the equation of the line.

• y = 3x - 2

• y = -3x - 2

Answer explanation

y-intercept is at (0, -2)

Slope is positive

Move up 1 and right 3 OR down -1 and left -3

So the equation is

y = 1/3x - 2

Tags

CCSS.HSA.CED.A.2

CCSS.HSA.REI.D.10

Write the equation for the graph

• y = 5x - 3

• y = 4x + 2

• y =-2x + 5

• y = - 2x + 4

Answer explanation

y-intercept is at (0, 4)

slope is negative

Move: down -2 and right 1 or up 2 and left -1

So the equation is

y = -2x + 4

Tags

CCSS.HSA.CED.A.2

CCSS.HSA.REI.D.10

What is the equation of the line?

Answer explanation

y-intercept is at (0,3)

Slope is negative

Move down -4 and right 5 or up 4 and left -5

So the equation is y = -4/5x +3

Tags

CCSS.HSA.CED.A.2

CCSS.HSA.REI.D.10

CCSS.HSG.GPE.B.5