Is this relation a function?
{(1,2), 2,3), (3,4)}
Yes-each input has exactly one output.
What is the domain and range of this relation?
{(1,4), (2,5), (3,6)}
Domain = {1, 2, 3}
Range = {4, 5, 6}
Find the slope and y-intercepts. Answer in ordered pair.
y=3x+2
Slope = 3
y-intercept = (0,2)
Solve for x
2x + 5 = 15
x=5
A line has slope m=3 and passes through the point (2,5). Write the equation of the function in slope-intercept form.
y = 3x - 1
Is this relation a function?
{(0,5), (0,7), (1,8)}
No-input 0 has 2 different outputs.
What is the domain and range?
f(x) = 3x + 2
Domain = all real numbers
Range = all real numbers
Find the x-intercept. Ordered pair.
y= -2x + 6
x-intercept = (3,0)
Solve
x/3 - 4 = 2
x=18
Find the equation of the line that passes through (1, 4) and (3, 10).
y = 3x+1
Is this a function?
x=4
Find the domain and range. Interval notation.
f(x) = sqrt(x-1)
Domain = [1, infinity)
Range = [0, infinity)
Find the slope, x-intercept, and y-intercept. Ordered pair.
y = 0.5x - 4
Slope = 1/2
y-intercept = (0,4)
x-intercept = (8,0)
Solve.
3(x - 4) = x2 - 5x + 6
x = 3 or x = 6
a line has slope m = -2 and passes through the point (-3, 7). Write the equation in standard form.
2x + y = 1
Is this a function?
y=sqrt(x-2)
yes-There is exactly one output per input and passes the vertical line test.
For what values of x is function defined, and what is the possible outputs?
f(x) = 5/(x-2)
Domain: All real numbers except x=2
Range: all real numbers except y=0
Find the slope of a line that passes through the points (1,2), (3,4)
m=1
Determine the restricted values:
4x/(x - 3) = (2x - 6)/(x + 1)
x is 3
x is -1
Undefined
Is this a function?
(x-4)2 + (y+2)2 = r2
No-This is a circle and has more than one output per input and fails the vertical line test.
What are the vertical and horizontal asymptotes of the function.
f(x) = 5/(x-2)
Horizontal asymptotes: y=0
Find the slope, x and y intercepts. Ordered pairs.
2x - 3y = 12
Slope: 2/3
y-intercept: (0, -4)
x-intercept: (6, 0)
Solve:
4x/(x - 3) = (2x - 6)/(x + 1)
x = -9
x = 1
A line passes through the points (4, -1) and (10, 2). Find the equation of the line in slope-intercept, point-slope, and standard form.
y = 0.5x - 3
x - 2y = 6
y + 1 = 1/2(x - 4)