Quadratics
What are the possible number of solutions that a quadratic equation can have?
0, 1, or 2
y = -x
x - y = 2
(1, -1)
What are the two equations for direct variation?
y = kx & y/x = k
12a2b2c
What is the slope of the following linear equation?
y = 9.5x + 570
9.5 NOT 9.5x
When there is no lead coefficient, what is the relationship between factors and solutions?
The constants in the factors have opposite signs of the solutions.
4x - 2y = 6
-4x + y = 1
(-2, -7)
Is this direct variation, inverse variation or neither?
y/4 = 2x
Direct variation
y= 8x
y = kx
(4a2d5)3
64a6d15
When students make mistakes, Mr. Riggs often uses analogies to help correct them. What is the most common thing for Mr. Riggs to make analogies about?
Food
What are the zeros of the following equation:
x2 + 3x + 2 = 0
x = {-1, -2}
x + y = 1
2x + 3y = 3
(0 , 1)
Is this equation direct, inverse, or neither?
y = -x/7
Direct
6fg2 * (2f5g7z)2
24f11g16z2
6x is the GCF of a quadratic equation. What is left after the GCF has been pulled out is 9x - 1. What are the x-intercepts of the quadratic equation?
x = {0 , 1/9}
How many x-intercepts does this quadratic equation have?
y = 8x2 + x + 6
0
y = x - 1
3x + 4y = 0
(4/7, -3/7)
Given inverse variation find y when x = 3 if y =7 when x = 9
y = 21
(3a-3b5cd-1)2
(9b10c2)/(a6d2)
When a student makes one of the common mistakes how many shames do they get?
fo shames for fo hundred
Find the roots of the following quadratic equation:
12x2 + 27x + 6 = 0
x = {-1/4 , -1/2}
DAILY DOUBLE!!!
2x + 3y = 5
3x + 2y = 10
(4,-1)
Given direct variation find x when y = 8 if y = 24 when x = 15.
x = 5
(th2)/(e-1h) + (ca)2(k2e3) + (i2s2)/(is) + 1/a-10 + l3ie4*l-2e-3
the + c2a2k2e3 + is + a10 + lie
What is the domain and range of f(x) = x2?
Domain: All Real Numbers
Range: y >= 0