Algebra 2 ,2-1 through 2-4 quiz
What are the rules for standard form? What is the formula for standard form?
Ax+By=C All whole numbers "A" has to be positive
Find g(-6) if g(x)=-2x+3
g(-6)=-2(-6)+3 g(-6)= 12+3 g(-6)= 15
Write an equation in slope intercept form for the line that satisfies each set of conditions Slope -5, passes through (-3,-8)
y+8=-5(x-3) y+8=-5x-15 y=-5x-23
What is the range?
The y co-ordinate
Rate of change
Is the slope basically
Is this a linear function? Y= 5/x
No, a variable cannot be in the denominator.
Find the x and y and graph them 2x-6y=18
2x=18. 6y=18 X=9. Y=3 (9,0). (0,3)
2y=10x -30
Solve it down into slope intercept form Y=-8x+41/2 R-O-C equals -8
What must a linear equation be in.
Standard form or slope intercept form.
What is domain?
The x co-ordinate
Zero in the denominator
Undefined
Write the equation in standard form. Identify A, B, and C. Y= 7x-5
Y= 7x-5 -7x -7x -7x+y =-5 -1•(-7x+y =-5) 7x-y =5 A= 7 B= -1 C= 5
Is this a linear function? Y=2/3 x
Yes it is in y=mx+b form.
(0,0) and (-5,-1)
Slope is 1/5
What can't a linear equation have
A linear equation can't have: -positive or negative variables -square roots -2 or more variables multiplied -variable in the denominator - the division sign
Find f(6) given f(x)=2x^2-8
f(6)=2(6)^2-8 f(6)=2(36)-8 f(6)=72-8 f(6)=64
What is a function?
A relation in which each element of the domain (x) is paired with exactly element of the range. *x cannot repeat *y can reapeat
X | Y -6 | -1 -3 | -7 -1 | 7 -5 |-9 6 |-9 What is the Domain? What is the Range? Is it a Function? Write as ordered pairs.
Domain= {-6,-5,-3,-1, 6} Range= {-9,-7,-1, 7} It is a function {(-6,-1) (-3,-7) (-1,7) (-5,-9) (6,-9)}
Is this a linear function? 9-5xy=2
No it is not, you cannot multiply 2 or more variables together.
What is point slope form
Y-y1=m(X-x1)
What is slope intercept form
Y=mx+b
Solve f(3) given f(x) = 5/(x)+2
f(3)= 5/(3)+2 f(3)= 5/5 f(3)= 1