Constructing Linear Functions

What variable is the slope/rate of change in y = mx + b?

What variable is the y-intercept in y = mx + b?

• y

• m

• x

• b

Construct a linear model for the graph.

• $y=-10x+40$

• $y=-10x+8$

• $y=-5x+40$

• $y=-5x+8$

Construct a linear model for the graph.

Construct a linear model for the table.

• $y=-2x+6$

• $y=-2x+3$

• $y=-6x+3$

• $y=2x+6$

Construct a linear model for the table.

Construct a linear model for the table.

A factory produces 25 cars each day.  There are already 20 that have been completed.  Construct a linear model to represent the number of cars in the factory.

• $y=20x+25$

• $y=25x+20$

• $y=-25x+20$

• $y=25x-20$

A charity has raised $400 and raises $300 more every week.  Construct a linear model to represent the money raised by the charity.

• $y=400x+300$

• $y=300x-400$

• $y=300x+400$

• $y=-400x+300$

The slope of a line is 5 and passes through the point (2, -3).

If you are trying to find the y-intercept, what variable will NOT be replaced with a number in y = mx + b?

• y

• m

• x

• b