Homework Help: Algebra

Posted by Kuku Monkey on Monday, October 5, 2009 at 11:23am.

1. Find the slope of the graph of the linear function f with f(0)=4 and f(3)=13.

I have no idea how to do this.. :(
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Evaluate the function when x=3, x=0, and x= -2.

2. f(x)=-1/2x+3
my answers: 1.5, 3, 1

3. h(x)=5.5x+4
my anwers: 20.4, 4, 7

4. g(x)=1/8-4
my answers: -3.625, -4, -4.25

5. k(x)=14-4x
my answers: 2, 14, 22

Please check if numbers 2-5 are correct. Thanks.

Algebra - bobpursley, Monday, October 5, 2009 at 11:40am
on the first.

slope= (f(3)-f(0))/(3-0)

the others are correct, but I would have done 4 in fractions.
Algebra - Kuku Monkey, Monday, October 5, 2009 at 11:43am
Thanks a lot!! =))
Algebra - MathMate, Monday, October 5, 2009 at 3:36pm
KukuMonkey, double check you work when you work with negative numbers.

2.
f(x)=-1/2x+3
f(-2)=4

3. h(x)=5.5x+4
my anwers: 20.4, 4, 7
h(3)=20.5
h(0)=4 (OK)
h(-2)=-7

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