Calculator 101
Which key on the TI-84 clears the screen?
A) DEL
B) 2nd
C) CLEAR
D) MODE
What is CLEAR?
What is the slope of the line y=2x+5?
What is 2?
What shape is the graph of a quadratic equation?
A) Line
B) Circle
C) Parabola
D) Hyperbola
What is Parabola?
Which is an exponential function?
A) y=2x+1
B) y=x2
C) y=3x
D) y=√x
What is C) y=3x?
Solve and what type of graph on the number line: x+3 < 7?
What is x < 4**, open circle on 4, arrow going left
A store is having a sale on notebooks. Each notebook costs $1.25. If Sam buys 8 notebooks and a binder for $4.50, how much does he spend in total?
What is 8×1.25+4.50=14.50?
Which menu do you access to find the square root symbol on a TI-84?
A) ALPHA
B) 2nd + MATH
C) 2nd + x²
D) STAT
What is C) 2nd + x²?
What does the slope represent in a real-world context?
A) Starting point
B) Rate of change
C) Direction only
D) None
What is Rate of change?
What is the vertex point of the parabola y=(x+3)2−4?
What is (−3,−4)?
Is y=(1/2)x exponential growth or decay?
What is decay?
Graph the solution to y > 2x − 1. What type of line and shading will be used?
What is a Dashed line and shade up?
A plumber charges a $50 service fee plus $80 per hour. Write an equation that models the total cost (C) for h hours of work.
What is C=80h+50?
You are solving 2x2−5x=3 using a graphing calculator. How do you find the solution?
What is graph both sides and find the intersection?
Write the equation of a line with slope 3 and y-intercept -4.
What is y=3x−4?
Factor completely: x2−7x+12
What is (x−3)(x−4)?
What is the y-intercept of y=5(2)x?
What is 5?
Solve: −3x + 5 ≥ 11
What is x ≤ −2**
A student scored 70, 82, and 91 on three tests. What score is needed on the fourth test to have an average of at least 85?
What is (70+82+91+x)/4 ≥ 85 ⇒ x ≥ 97?
You want to graph y=∣x−4∣. Which calculator feature helps you graph this?
What is the MATH → NUM → abs() function?
Find the equation of the line passing through (2, 5) and (4, 9).
What is y=2x+1?
Solve x2−4x=12 by completing the square.
What is (x-2)2 = 16 and x=6 or x=−2?
If a population in the Canadian Mountain Range grows at a rate of 8% per year, and the population in 2015 is 200, then in the year 2020 we estimate that the population will be 6,400. write an equation for year t.
What is P=200(1.08)t?
When graphing the inequality y≥−2x+5, what are the line, shading slope, and y-intercept used?
What is Solid line, shade above, slope -2, y-intercept 5?
A theater sold 250 tickets. Child tickets cost $6, and adult tickets cost $10. If the total ticket sales were $2,040, how many of each type were sold? whats the equations and solutions?
x+y=250
6x+10y=2040
115 child tickets and 135 adult tickets
How do you calculate a regression line on the TI-84 after entering data in L1 and L2?
What is STAT → CALC → LinReg(ax+b)?
Two taxi companies charge differently based on their location. Company A charges a $3 initial cost and $2 per mile, while Company B charges a $5 initial cost and $1.5 per mile. After how many miles do they cost the same?
What is 4 miles?
A ball is launched from a cliff. Its height is modeled by h(t)=−16t2+32t+80. When does it hit the ground?
What is when h(t)=0; solve the quadratic: t≈5 seconds
The value of a car decreases by 12% each year. If it was worth $25,000, write an equation for the value V after t years.
What is V=25000(0.88)t?
When graphing the system of inequalities below, identify the slope, y-intercept, boundary line type (solid or dashed), and shading direction for each inequality:
y<12x+3
y≥−x+1
First Inequality: y<12x+3
Slope: 1/2
Y-intercept: 3
Line type: Dashed
Shading: Below the line
Second Inequality: y≥−x+1
Slope: −1
Y-intercept: 1
Line type: Solid
Shading: Above the line
Emily buys 3 drinks and 2 sandwiches for $17.75. Jason buys 2 drinks and 4 sandwiches for $23. What is the cost of one drink and one sandwich? What are the equation(s) and solutions?
3x+2y=17.75
2x+4y=23
Drink = $3.13, Sandwich = $4.19