Finding Slope and Intercepts from Different Forms

Which equation matches the table?

• y = 3x + 9

• y = x + 9 

• y = x + 3

• y = 12x - 3

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

What is the y-intercept?

• 1/2

• 2

• 7

• 3

In slope-intercept form, what does the m represent?

( y = mx + b)

• mountains

• Slope

• y-intercept

• mixed up

Answer explanation

We often think of m (slope) telling us how to "move" on the line! Rise over run!

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

In slope-intercept form, what does the b represent?

( y = mx + b)

• blah blah blah

• bend in the graph

• y-intercept

• slope

Answer explanation

We often think of b (y-intercept) telling us whter the graph "begins" on the y-axis! The value of y when x =0!

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

Which could be the graph of the equation y = 1/3x - 2?

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Which graph best represents the equation y = -3x + 4?

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What is the slope of the line? (pay attention to the direction of the slope or in what direction you move for the sign of the slope!)

• -2

• 2

• -1

• 1

Tags

CCSS.8.EE.B.5

When graphing from slope-intercept form ( y = mx +b), first you graph the ______ value on the ________________.

• m value on the y-axis

• m value on the x-axis

• b value on the y-axis

• b value on the x-axis

When graphing, what do you do after you graph your y-intercept?

• Find slope and move the run(left or right) then move the rise (up or down)

• Find slope and move the rise (up or down) then move the run (left or right)

• Draw a vertical line

• Draw a horizontal line

Which could be the graph of the equation y = 2/3x - 4?

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