Unit 1
k/3 - 19 = 26
What is k = 135?
Determine if this set is a function or not and explain why.
(1,6) (2,6) (3,4) (4,5)(6,1)
What is... Yes it is a function because each input has exactly one output.
Graph the system of inequalities:
y > - 3x + 1
y < 2x + 4
Check work.
Define residual
The distance a point is away from the LOBF.
How do we write point-slope form, standard form, and slope-intercept form?
What is...
y - y1 = m (x - x1)
AX + BY = C
y = mx + b
-6 - 3(2k + 4) = 18
What is k = -6?
What are the other 3 ways of referring to your x-values?
What are... Input, Independent variable, Domain
Graph the systems of equations:
4x + y = 6
y = -4x - 1
Check work.
What two things must you include when describing correlation?
What is... Strength and direction?
Solve for x.
1/4x + 1/2 - 1/8 = 4 - x
x = 2.9
3(n-1) = 5n + 3 - 2n
What is no solution?
What is the equation of the line that passes through (3, 6) and (-5, 6)?
What is y = 6?
Johnny wants to buy food for his friends. Each burrito costs $6.50 burritos and each bag of chips cost $2.50. He spends a total of $47.50. He bought 12 items in total.
Define your variables and set up a system of equations.
x = # of burritos
y = # of bags of chips
6.50x + 2.50y = 47.50
x + y = 12
What does it mean if a point has a negative residual?
What is... The line overestimated the point because the point is below the line.
What would be the solution to a systems of equations where the two equations are the same?
What is... all real numbers on the line.
Solve for d.
-2(-2 + 2d) > 4(d-1)
What is d < 1?
Write the equation of the line that passes through the point (-1, 2) and (2,4).
What is ... y - 2 = 2/3 (x + 1) OR y - 4 = 2/3 (x - 2)?
Solve using substitution
y = 4 + 3
x = -2y
( -14, 7)
Answers vary.
Solve for E.
BR = E/A + K
A(BR - K) = E
Determine if the number (-4) is a solution of the inequality.
2y + 1 > -5
What is no.
What is y - 4 = -1/2 (x +1)?
4b = 3a + 7
-2a + 4b = -3
(-10, -23/4)
What are the three things needed for a linear model to be appropriate?
What is... a linear scatter plot, a residual plot with no pattern, and a correlation coefficient that is strong.
Solve for X.
32 + x2 - 10 = 5
What is... +/- 2.