Finding slope, y-int, and writing equations

Slope & Y-Intercept from Equation, Table, Graph & Slope Intercept Form

Change in y OVER Change in x

The slope in a Y-form equation is ALWAYS the # in front of x.

x ix NOT Part of the SLOPE!

ONLY the # is the SLOPE.

Slope is a # not an x or variable.

The slope is the 3 NOT 3x.

Multiple Choice

What is the slope in this equation?

• -2

• +5

• 2

• 2x

Multiple Choice

What is the slope of this equation?

• $$-\frac{1}{2}$$

• $$\frac{1}{2}$$

• 2

• $$\frac{1}{2}x$$

Multiple Choice

What is the slope of this equation?

• $$-\frac{7}{3}x$$

• $$3$$

• $$\frac{7}{3}$$

• $$-3$$

Multiple Choice

What is the slope of this equation?

• $$-6x$$

• $$-6$$

• $$-5$$

• $$5$$

Multiple Choice

What is the slope of the equation?

• $$0$$

• $$1$$

• undefined

• not one

Finding the Y-Intercept from an Equation

1. Find the constant. Also called your starting point.

2. It is the number added or subtracted to the slope/x term.

The y-intercept is -5.

Multiple Choice

What is the y-Intercept in this equation?

• $$2$$

• $$5$$

• $$2x$$

• $$-5$$

Multiple Choice

What is the y-Intercept in this equation?

• $$\frac{1}{2}$$

• $$2$$

• $$\frac{1}{2}x$$

• $$-2$$

Multiple Choice

What is the y-Interceptof this equation?

• $$-\frac{7}{3}x$$

• $$3$$

• $$\frac{7}{3}$$

• $$-3$$

Multiple Choice

What is the y-Intercept of this equation?

• $$-6x$$

• $$-6$$

• $$-5$$

• $$5$$

Multiple Choice

What is the y-intercept of the equation?

• $$0$$

• $$1$$

• undefined

• not one

Multiple Choice

What is the slope & y-inerept of this equation?

• m = -2x & b = 5

• m = -2 & b = 5

• m = 5 & b = -2

• m = 2 & b = 5

Multiple Choice

What is the slope & y-inerept of this equation?

• m = 0x & b = 3

• m = 1 & b = 3

• m = 3 & b = 1

•  b = 3

Finding the slope from a table.

Multiple Choice

What is the slope in this table?

• $$3$$

• $$4$$

• $$0$$

• $$undefined$$

Multiple Choice

What is the slope in this table?

• $$2$$

• $$4$$

• $$-2$$

• 30

Multiple Choice

What is the slope in this table?

• $$-2$$  

• $$+2$$  

• $$0$$  

• $$-4$$  

Multiple Choice

What is the slope in this table?

• $$6$$

• $$-6$$

• $$0$$

• undefined

Finding the y-Intercept in a table.

Find the # for y that coordinates with x=0.

In the coordinate point where x = 0, that's your y- Intercept.

y-intercept in this pic is (0, 15) or 15.

Multiple Choice

What is the y-intercept in this table?

• $$3$$

• $$4$$

• $$0$$

• $$undefined$$

Multiple Choice

What is the y-intercept in this table?

• $$2$$

• $$4$$

• $$-30$$

• $$30$$  

Multiple Choice

What is the y-intercept in this table?

• $$-2$$  

• $$2$$  

• $$0$$  

• $$-4$$  

Multiple Choice

What is the y-intercept in this table?

• $$6$$

• $$-6$$

• $$0$$

• undefined

Multiple Choice

What is the y-intercept?

• -1/3

• -3

• -4

• 5

Finding the slope from a graph.

Multiple Choice

What is the slope?

• $$\frac{1}{5}$$

• $$-5$$

• $$0$$

• undefined

Multiple Choice

What is the slope?

• $$\frac{2}{5}$$

• $$-\frac{2}{5}$$

• $$-2$$

Multiple Choice

Find the slope of the line below using rise/run.

• $$\frac{2}{3}$$

• $$\frac{3}{2}$$

• 3

• $$\frac{1}{3}$$

Multiple Choice

Find the slope of the line below using rise/run.

• $$\frac{1}{2}$$  

• $$\frac{2}{1}$$  

• 2

• 1

Finding the y-intercept from a graph.

• Find the y-axis on the graph.

• Trace your finger down the axis until you find where the linear line crosses the y-axis.

• That is your y-intercept.

Multiple Choice

What is the y-intercept? 

• 25
• 50
• 75
• 100

Multiple Choice

What is the y-intercept of the line?

• (0, -4.5)
• (0, 4.5)
• (0, 5)
• (0, -5)

Multiple Choice

What is the y-intercept?

• 2
• 4
• 6
• 8

Multiple Choice

What is the y-intercept? 

• 0
• 1
• 2
• 3

Multiple Choice

What is the y-intercept?

• 1
• 2
• 3
• 4

Multiple Choice

What is the y-intercept

• 14
• 16
• 18
• 20

Writing an equation in slope-intercept form.

1. Find your slope and y-intercept from the given table or graph. Then plug it into the formula y=mx+b.

m=slope (the number connected to x)

b=y-intercept (the number by itself)

Multiple Choice

What does "b" represent in y=mx+b?

• y-intercept
• slope
• macaroni
• nothing

Multiple Choice

What does "m" represent in y=mx+b?

• y-intercept
• slope
• macaroni
• nothing

Multiple Choice

How would you write the equation with a slope of 2/3 and a y-intercept of -3

• y=3/2x+3
• y=2/3-3
• y=2/3x-3
• y=2/3x+3

Multiple Choice

If m=3 and b=6, what is the correct slope intercept equation?

• y=3-6
• y=3x-6
• y=3x+6
• y=6x+3

Multiple Choice

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

• y= -1x+3
• y= 4x+3
• y=1/4x+3
• y= -4x+3

Multiple Choice

Write the equation of the line.

• y= -1x-3
• y= -3x-1
• y=-1/3x-1
• y= -3x-3

Multiple Choice

Which equation matches the graph? (Click me to see the image)

• y = 2x
• y = 1/4 x + 2
• y = 1x + 4
• y = -2x

Multiple Choice

Write the slope intercept form of the equation graphed.

• y = -2x + 3
• y = 1.5x + 2
• y = 2x - 3
• y = -1.5x - 2

Multiple Choice

Which equation matches the table?

• y = x + 5
• y = 5x
• y = x - 5
• x = y - 5

Multiple Choice

Which equation matches the table?

• y = 3x + 9
• y = x + 9 
• y = x + 3
• y = 12x - 3