Functions
Line/Curve of Best Fit
Domain and Range
Direct or Inverse Variation
Mystery
100
If f(x)=15+3x, what is f(-3)?
6
100
Using your calculator find the line of best fit for these points: x:{400, 120, 300, 950} y:{8, 2, 3, 12}
y=0.012x+0.86
100
Find the domain and range. {(-3,2),(-2,4),(-1,2),(5,4)}
Domain: -3, -2, -1, 5
Range: 2,4
100
Given that y varies inversely with x and y=3 when x=2. Find y when x=3
y=2
100
Write 3x-2y=6 in slope-intercept form.
y=3/2x-3
200
If f(x)=1/4x+5, what is f(-8)?
3
200
Using the data below, Find the line of best fit and use it to estimate y if x=5 x: {2, 4, 6, 8} y: {4, 8, 15, 16}
y=10.75
200
Find the domain and range. {(-5,8),(-5,4),(6,9),(3,10)}
Domain: {-5, 3, 6}
Range: {4, 8, 9, 10}
200
If y varies directly with x and y=80 when x=16. Find y when x=3.
y=15
200
What are the two requirements for a graph that shows a direct variation.
Straight line
Through the origin
300
Name an ordered pair that satisfies the function f(x)=3x-5?
Mrs. M checks
300
x: {1,2,3,4,5}
y:{52.5, 73.2, 74.6, 55.8, 16.1}
Write the equation for the curve of best fit.
y=-10.1x^2+51.4x+11
300
Find the range of the graph below 
y>=1
300
What kind of variation is shown here: xy=5
Inverse
300
What is the vertical line test? What is it used for?
To determine if a graph is a function.
400
If f(x)=(2x/5)-4 and f(x)=-1, what is the value of x?
15/2 or 7.5
400
x: {-3, -2, -1, 0, 1 ,2}
y:{-15, -9, -5, -3, -3, -5}
Find the equation of the curve of best fit for this table?
y=-1x^2+x-3
400
What is the domain of the graph below? 
x=1, 2, 3, 4, 5, 6
400
Given y varies directly with x and y=7 when x=14. Find x when y=9.
x=18
400
What is the equation you plug in to desmos to get a CURVE of best fit?
y1~ax1^2+bx1+c
500
What are the zeroes of the function f(x)=3x^2-x-10?
-1.66 and 2
500
x: {-3, -2, -1, 0, 1 ,2}
y:{-15, -9, -5, -3, -3, -5}
Figure out what y is going to be when x is 5.
y=-23
500
What is the domain and range of the graph below?
x=-4, -2, 1, 3
y= -2, -1, 2, 3
500
Given that y varies inversely with x, use the specified values to write an inverse variation equation that relates x and y. y = 2 x = 1
y=2/x
500
Translate the verbal expression: a number, y, is equal to nine less than the square of a number, x.
y=x^2-9