Functions and Relations
Is this relation or a function? {(-3, -7), (-1, -3), (0, -1), (2, 3), (4, 7)}
function
Evaluate the function: f(x)=x+6, f(5)
11
What are the x and y intercepts of the linear equation? 2x+3y=12
6;4
What is the slope and y-intercept? y=-3x+2
slope:-3, y-intercept: 2
What is the slope of y+12=-2/5(x-5) ?
-2/5
Is this relation or a function? {(-5, 5), (-4, 2), (0, 2), (1, 3), (-5, 4)}
Relation
Find the value of x so that the function has the given value. t(x)=3x, t(x)=24
8
What are the x and y intercepts of the linear equation? -4x+8y=-16
4; -2
What is the x-intercept? y=-x+7
7
What is (x1, y1) of y+8=3(x-4)
(4,-8)
Is this function linear or non-linear? 4x+5y=10
Linear
Evaluate the function. b(x)=18-0.5x, b(-2)
19
What are the x and y intercepts of the linear equation? -6x+9y=-18
3; -2
Find the slope and the y-intercept: -2x+y=4
slope:2 y-intercept: 4
Graph the linear equation: y-2=1/2x
m=1/2; (0,2)
Is this function linear or non-linear? y=(x-1)(x+7)
Non-Linear
Find the value of x so that the function has the given value. j(x)=-4/5x + 7; j(x)=-5
11
What are the x and y intercepts of the linear equation? 3x-6y=2
2/3; -1/3
What is the x-intercept? 3x+y=-1
-1/3
Graph the linear equation: y-5=0(x+3)
Horizontal Line at y=5
Is this function linear or non-linear? {(0,3), (1,5), (2,7), (3,9)
Linear
Let H(x) be the percent of U.S. households with Internet use x years after 1980. Explain the meaning of the statement. H(23)=55
55% o U.S. households had Internet use in 2003.
What are the x and y intercepts of the linear equation? -x+8y=4
The following points lie on a line. What is the slope of this line? {(-9, -2), (-5, 0), (-1, 2), (3, 4)}
1/2
Write the equation of the line in point slope form that passes through (3,5) and has a slope of 7.
y-5=7(x-3)