Relations and Functions Review

Find the domain {(3, 4). (9, 4), (3, 0), (4, 3), (-1, 0)}

Domain = {_______}

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

If f(x) = |x – 1| , then find f(-1)

Tags

CCSS.HSF.IF.A.2

Is the graph shown a function?

• No, it does not pass the horizontal line test

• No, it does not pass the vertical line test

• Yes, it passes the horizontal line test

• Yes, it passes the vertical line test

Determine whether y varies directly as x.

Assume that y varies directly as x.  If y = ½ when x = 4,

find the values of y when x = 10.

Write the equation of the line in slop-intercept form.

-y + 5 = -2x.      

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

Given the equation of the line

What is the slope?  What is the y-intercept?

• Slope = -4,

  y-intercept = 2.5

• Slope = 4,

  y-intercept = 2.5

• Slope = 4,

  y-intercept = -2.5

• Slope = -4,

  y-intercept = -2.5

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

Write the equation of the line, in point-slope form, that contains these two points.

(-4, 10) and (-6, 5)

y = ______

Find the x and y intercept of this line.

3y – x = -6

• x-intercept = (0,-2)

  y-intercept = (0, 6)

• x-intercept = (6,0)          

  y-intercept = (0, -2)

• x-intercept = (-6,0)            

  y-intercept = (0, 2)

• x-intercept = (0,2)             

  y-intercept = (0, -6)

Write the equation of a line that is perpendicular to the line 3y – x = -6

and passes through the point (6, 0)

y = ________