Summarize The Math (p. 9)
a. Suppose y is directly proportional to x with constant of proportionality k>0.
i. if x increases by 1, y……
ii. if x doubles, y….
iii. graph of the function looks like….
b. A function with rule y = mx + b where b ≠ 0 is not a model of direct variation.
i. differences between graph of linear function and related direction variation y = mx….
similarities between graphs…..
ii. differences between tables of same two functions….
similariites between tables….
c. Suppose y is inversely proportional to x with constant of proportionality k>0.
i. is x increases, y…..
ii. if x doubles, y…..
iii. graph of the function looks like…..
Check Your Understanding (p. 9)
Direct, Inverse,
Function
Neither?
a. N = 100h
b. B = 50(2t)
c.
d. C = 0.2w
e. v = 64 – 32t
Constant of
Proportionality
Sentence Describing
Function
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