BELLRINGER A cell phone company charges a $20 flat fee plus $0.05 for every minute used for calls. Make a table of values from 0 to 60 minutes in 10-minute intervals that represents the total amount charged.

BELLRINGER -DEBRIEF A cell phone company charges a $20 flat fee plus $0.05 for every minute used for calls. Make a table of values from 0 to 60 minutes in 10-minute intervals that represents the total amount charged.

STANDARD MGSE.A.CED.2 ★ Create linear, quadratic, and exponential equations in two or more variables to represent relationships between quantities; graph equations on coordinate axes with labels and scales. (The phrase “in two or more variables” refers to formulas like the compound interest formula, in which A = P(1 + r/n)nt has multiple variables.) MGSE.N.Q.1 ★ Use units of measure (linear, area, capacity, rates, and time) as a way to understand problems: a. Identify, use, and record appropriate units of measure within context, within data displays, and on graphs; b. Convert units and rates using dimensional analysis (English-to-English and Metric-to-Metric without conversion factor provided and between English and Metric with conversion factor); c. Use units within multi-step problems and formulas; interpret units of input and

LEARNING TARGET Learning Targets for CED.2  I can identify the quantities in a mathematical problem or real world situation that should be represented by distinct variables and describe what quantities the variables represent.  I can graph one or more created equation on a coordinate axes with appropriate labels and scales.  I can create at least two equations in two or more variables to represent relationships between quantities  I can justify which quantities in a mathematical problem or real-world situation are dependent and independent of one another and which operations represent those relationships.  I can determine appropriate units for the labels and scale of a graph depicting the relationship between equations created in two or more variables. Learning Targets for NQ.1  I can identify and use the appropriate unit of measure within context, within data displays, and on graphs.  I can convert units and rates using dimensional analysis within the same measurement system without a conversion factor provided.  I can convert units and rates using dimensional analysis between English and Metric systems with conversion factor provided.  I can use units with multi-step problems and formulas.

MINI LESSON Linear equations in two variables can be written in the form y = mx + b m is the slope b is the y-intercept The slope of a linear graph is a measure of the rate of change of y with respect to x. The y-intercept of the equation is the point at which the graph intersects the y-axis, which means that the value of x is 0.

MINI LESSON The slope of a linear graph is a measure of the rate of change of y with respect to x. The y-intercept of the equation is the point at which the graph intersects the y-axis, which means that the value of x is 0.

WORK SESSION Example 1 A local convenience store owner spent $10 on 144 pencils to resell at the store. What is the equation for the store’s profit if each pencil sells for $0.50?

WORK SESSION Example 2 A taxi company in Kansas City charges $2.50 per ride plus $2 for every mile driven. Write and graph the equation that models the cost of a taxi ride.

WORK SESSION Practice #3-10 ODD Write equations only.

CLOSING A cell phone company charges a $20 flat fee plus $0.05 for every minute used for calls. Write an algebraic equation that could be used to represent the situation.

HOMEWORK Practice #4-10 EVEN Write equations only.