Function Rules & Vocab
Evaluating Function Rules
Linear Function Review
Graphing
Is it a Function?
100
In order to be a function, every input must have ___ output(s).
What is ONE?
100
Evaluate y=-3x if x=2
What is -6?
100
The equation for slope-intercept form
What is y=mx+b?
100
If a line goes uphill from left to right on a graph, the slope of the line is _____.
What is positive?
100
Is it a function? Explain.
{(2, 3), (4, 5), ( -2, 6)}
What is YES because all inputs only have one output?
200
Write a function rule for the statement.
The output is 4 more than 3 times the input.
What is y=3x+4?
200
Evaluate y=2x+1 if x=-2
What is -3?
200
Write the equation of a line with a slope of 3 and a y-intercept of 0.
What is y=3x?
200
Find the slope between the two points.
(6, 2) and (1, 8)
*Hint: Find the rise over the run in a table*
What is -6/5?
200
Using the vertical line test does the graph of the points (1,3) and (1,5) represent a function?
What is False, the points fail the vertical line test
300
Write a function rule for the statement.
The output is one-third of the input.
What is y=1/3x?
300
Evaluate y=-3 - x if x=6
What is -9?
300
What is the slope of the line with the equation
y=1/2x-2
What is 1/2?
300
Find the slope of the line going through these points.
(0, 4), (1, 10)
*Hint: Find the rise over the run in a table*
What is 6?
300
Is it a function?
| x | y |
| 2 | 4 |
| 1 | 5 |
| 2 | 6 |
What is NO because x repeats?
400
Write a function rule for the statement.
The output is six less than the input.
What is y = x - 6?
400
Evaluate y=25 + 4x if x=5
What is 45?
400
What is the slope of a horizontal line?
What is 0?
400
Find the slope of the line going through these points.
(4, 4) and (2, 4)
What is 0?
400
Is it a function?
%26x%3D0003&imgrefurl=http://www.algebra.com/algebra/homework/Coordinate-system/Coordinate-system.faq.question.24806.html&usg=__N8FQPaDH4lCUX1u24T4Y85yHJg0=&h=302&w=308&sz=8&hl=en&start=18&zoom=1&tbnid=QxN6mNRwuBZU7M:&tbnh=115&tbnw=117&ei=dJa7TY3pKaLz0gH9iYCwBg&prev=/search%3Fq%3Dlinear%2Bgraphs%26hl%3Den%26rls%3Dcom.microsoft:en-us:IE-SearchBox%26rlz%3D1I7TSNA_enUS397US397%26biw%3D1345%26bih%3D606%26site%3Dsearch%26tbm%3Disch&um=1&itbs=1)
What is YES because it passes the Vertical Line Test?
500
The test to tell if a graph is a function
What is the Vertical Line Test?
500
Evaluate y=-(4x+2) if x=7
What is -30
500
What is the y-intercept of the line with the equation
y=-3x-6
What is -6
500
Find the y-intercept of the line going through these ordered pairs.
(0, 2), (1, 4), (2, 6), (3, 8)
What is 2?
500
Is it a function? 
What is NO because it does not pass the Vertical Line Test?