Solving for one variable
Slope
Scatterplots
Mystery
100
Solve for y.
4x + 28 = 7y
y = 4/7 x + 4
100
Identify the slope and y-intercept.
y = -5x + 8
slope: -5
y-intercept: 8
100
State if there is a positive, negative, or no association. EXPLAIN your reasoning.
Length of hair and shoe size.
No association.
The length of your hair does not determine your shoe size.
100
State if there is a positive, negative, or no association. EXPLAIN your reasoning.
Days and amount of mold on cheese.
Positive association
As days increase, cheese gets moldier.
200
Solve for y.
6y - 3x = 18
y = 1/2 x + 3
200
Identify the slope and y-intercept
y = 11x - 14
slope: 11
y-intercept: -14
200
State if there is a positive, negative, or no association. EXPLAIN your reasoning.
The number of hours spent hiking in the mountains and the amount of water left in your water bottle.
Negative association.
As you spend more time hiking, the amount of water you have decreases.
200
Solve for x.
3 + 4(x+1) = 159
x = 38
300
Solve for x.
4(2x + 3) = -3(x - 1) + 31
x = 2
300
Baylor grows 10 pounds every 3 months.
Find the slope of this situation and explain it in a unit rate.
slope: 10/3
Every month, Baylor grows 3.33 pounds.
300
Using the line of best fit, predict the sales when it is 17 degrees Celsius.
About $350
300
Identify the slope and y-intercept and EXPLAIN how you were able to determine which was which.
y = 4x - 7
slope: 4x - x tells us growth
y-intercept: -7 - number without x is our start
400
Solve for x.
4(x+1) - 6 = 3x - 2
x = 0
400
Using the graph, write the equation of the line.
y = 2x + 4
400
Write an equation for the line of best fit.
y = 4/12 x + 17
400
Solve using the fraction buster method.
1x/4 + 1/10 = -3x/20 - 7/10
x = -2
500
Solve for x using the fraction buster method.
-5x/3 + 2/5 - 1x/3 + 1 = 0
x = 0.7
500
Using the graph, write the equation of the line.
y = -x - 3
500
Create an equation for the line of best fit. Then use it to predict hours of sleep after 10 cups of coffee.
y = -2/3 x +8.5
y = -2/3(10) + 8.5
y = 1.8 hours of sleep
500
Using the graph, write the equation of the line.
y = -2/3 x + 2