Functions & Linear Functions
How do you Identify a Function from a non-function?
A. Slope Intercept form
B. Vertical Line test
C. There is no way to identify without a graph
B. Vertical Line test
What is the slope for these two points on the graph? (-5,9) & (-4,20)
-4 - -5 (this is -4+5 too) = 1
20 - 9 = 11
The Slope is 1/11 or 0.09!
When multiplying or dividing a negative by a negative the result is a...
Positive! (Think about when you draw a plus sign, there are basically two negative lines you're drawing which shows how two negatives make a positive!)
There is a wavy line on the graph that continuously goes down without overlapping, which description best describes the phenomenon?
A. Non-linear, Function
B. Linear, Not a function
C. Non-linear, Not a function
D. Linear, Function
A. Non-linear, Function
Find the slope-intercept form of the following information. (The Slope-intercept form is y=mx+b)
y-intercept = -22
(-4,16) & (5,-11)
5--4 (this can also be 5+4) = 9
-11 - 16 = -27
9/-27 = -3
y = -3x - 22
Negative! (Think about this as the negative will always overpower the positive in multiplication and division.)
There is a horizontal line on the graph, which definition best describes this phenomenon?
A. Function
B. Non-Function
C. Undefined
A. Function
For this question, I will write down a random slope-intercept form on my whiteboard and the answer will be revealed there, good luck!
Look at the circled answer on the whiteboard, did you mess up? If so, explain where you messed up and what you should've done instead to show your understanding, we can always do more review after this if needed!
(True or False) When coming across an equation where two negatives touch, you can automatically think of just subtracting.
Ex: 6--4 = -2
False! When coming across an equation where two negatives touch, you can automatically think of adding, remember that the two negatives form together to create a positive look! - & | make + how cool there are two negatives in a positive!
There is a vertical line on the graph, which definition best describes this phenomenon?
A. Function
B. Non-Function
C. Undefined
B. Non-Function
If there is a straight positive line on a graph, is it a Linear Function?
Yes! (This should be an easy 500 points, good job!)