Functions
What is the definition of a function?
Sing the slope song quietly to yourself.
The rise over the run,
the rise over the run,
that's how we find the slope,
the rise over the run.
What is the y intercept of y = 2x - 10?
-10
Draw a line that has a negative slope.
The line should be decreasing from left to right.
x
Find the slope between (-3, 6) and (-1, 2)
-2
Is (-1, 6) a solution to y = -8x - 2?
yes
Sketch a graph of the line x = -10. What is its slope?
vertical line
slope = undefined
Is the range the x values or the y values?
y
Find the slope between (6, 9) and (-3, 9)
0
What does the "m" and "b" stand for in the general form y = mx+b?
m = slope
b = y-intercept
Sketch a graph of the line y = -6. What is its slope?
horizontal line
slope = 0
How do you know if a graph is considered a function?
It passes the vertical line test.
Find the slope between (0, 0) and (3, 2)
2/3
Solve for y.
8x + 4y = 20
y = -2x + 5
A graph of a proportional relationship always goes through the _________.
origin