Video 3

SAT Math Lesson Function and Graphs

First information that we get from this question is the graph of y=g(x). But how we can solve the problem?the problem is we must find out what is the value of h(1).
That look easy.We only plug in the h(1) into the function of

h(x)=g(2x)+2 .And look the function y= g(x). We have g(2) and if g(2) so the y is 1. And The answers is h(1)=1+2 = 3

1. Let the function f defined by f(x)=x+1. If 2 f(p)=20.What is the value of f(3p).
Same think like above, we must understand what is the purpose of this question. This question is looking for f when x is equal 3p. Next information is f(x)=x+1. We can solve all such as like this:
f(x)=x+1 what f when x is equal 3p.
2 f(p)=20 x=3p
f(p)=10 x=27
f(p)=p+1 =10 f(27)=27+1
p=9 =28. This is the answer

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