Functions/Slope
In order for something to be a function, what must be true?
Each input only has one output
A student has been recording the amount of money in their bank account each week this year. The function y= 17.2x + 27.5 can be used to represent the amount of money in the account, y, at the end of x weeks this year. What does 17.2 represent?
The amount of money the student puts in the account each week.
What is the equation for the pythagorean theorem?
a^2 + b^2 = c^2
A student is solving the equation 3x = 3x + 1. Subtracting 3x from both sides results in the equation 0 = 1. How many solutions are there to this equation?
None because 0 does not = 1.
Between which two numbers is the value of the square root of 8.25?
2 and 3
Is the set of ordered pairs (1,-3), (5,6), (0,-2), (0,5), (3,6) a function?
No. The x-value of 0 is assigned to two different y-values.
A student has been recording the amount of money in their bank account each week this year. The function y= 17.2x + 27.5 can be used to represent the amount of money in the account, y, at the end of x weeks this year. What does 27.5 represent?
The amount of money that was in the account to start with.
In right triangle XYZ, angle X is a right angle, and the measure of angle Y is 25. What is the measure of angle Z?
65
How many solutions does x + 2 = 2 have?
1. X=2
Simplify: 24 x 27
211
Show graph of a function on test prep question #7.
B.
Two proportional relationships, P and Q, are described in these statements: In relationship P, the value of y increases by 2 as x increases by 5. In relationship Q, the value of y increases by 4 as x increases by 1. Which relationship has a greater rate of change/slope?
Q
The shortest sides of a right triangle have lengths 20 units and 21 units. What is the perimeter, in units, of the triangle?
70 units
How many solutions does 2x + 5 = 5 have?
1. X=0
Simplify 32y2z7 / y3z4
9z3 / y