Functions
Is the following a function?
{(3, 9), (4, 9), (1, 0), (-2, 4)}
YES
Solve for the unknown variable 2x + 8 = -22.
x = -15
Find the slope in the equation y = -3x - 4
-3
Find the y-intercept in y = -x + 5.
5
Solve the system of equations
x = 2 and y = 3x - 1 using substitution.
(2,5)
If f(x) = -3x - 9, what is f(-2)?
-3
Solve for the unknown variable -3(x+2) - 5 = 4
x = -29
Determine the slope of the line
2x + 4y = 9
-1/2
Miles works out everyday by running. He stretches for 10 minutes, and then runs x number of miles at a rate of 7 minutes per mile. Write an equation that represents how long his workout is after running x number of miles.
y = 7x +10
Solve the two equations
y = 4x + 2 and y = 2x - 8 using substitution.
(-5, -18)
If f(x) = -3x - 9, solve for x if f(x)=6
-5
Solve for the unknown variable 2x - 8 - x = 10 + 3x
x = -9
Determine the slope between the points;
(-3, 10) and (5, -2)
-3/2
Find the y - intercept of 4x - 3y = 12
(0, -4)
What is the slope formula given two points (x1 , y1), (x2 , y2)?
m = (y2 - y1)/(x2 - x1)
Solve for x,
-2(x - 3) - 2 = 8
x = -2
Solve for the unknown variable
5 - (x - 3) = 2x - 4 + x
x = 3
What is the equation of the line that goes through the point (0,7) and has a slope of -3?
y = -3x +7
It costs $10 to rent a pair of bowling shoes, plus $3 per game you bowl. Write an equation that represents the cost to bowl x number of games.
y = 3x + 10
Solve the system of equations
2x + y = -4 and 3x + y = 2.
(6, -16)
Solve for A?
V = (Am)/2
A = (2V)/m
Cole and his four friends each bought a toy. They bought lunch and spent a total of $29 and left a $5 tip. They started out with $64 total and now come home with no money. How much did each toy cost?
$6
What is the equation of the line that goes through the points (2, 5) and (-1, -1)
y = 2x + 1
What is the point slope formula?
y - y1 = m(x - x1)
Solve the two systems
2x + y = 5 and -2x -3y = -11
(1,3)