Algebra I

Line Exploration

In the following problems, we'll use visualizations with sliders (like the one below) to reason about lines and the equations that describe them.

In the visual above, can you imagine what would happen if you were able to keep moving the slider further and further to the right?

               

Line Exploration

The slider below modifies one of the parameters of a linear equation. What could we reasonably expect to happen to the line if the slider were to move to a negative value?

               

Line Exploration

These steepness (called the slope) of the two lines are controlled by the sliders below. What would happen to the lines if the sliders had the same value?

Hint: pay attention to the value labels on the sliders; even if the sliders are in the same position, they may not correspond to the same value.

               

Line Exploration

In the equation y=kxy=kx, any change to the value of xx results in a change to the value of yy.

If adding 33 to xx results in yy growing by 1212, what is the value of kk?

               

Line Exploration

The slider below controls the slope of all the lines. If the lines below are described by equations in the form y=mx+by=mx+b, which parameter is the slider controlling?

               

Line Exploration

The equation that powers the visualization below is y=mx+by=mx + b. mm controls the slope of the line and bb controls its position. Is it possible to make every line shown above in the format y=mx+b? y = mx + b ?

               

Line Exploration

We want the line shown to pass through the marked red point at (2,2). (2,2) . Which values of mm will work? Mark all that apply and note that bb can vary. y=mx+b y = mx + b

               

Select one or more

Line Exploration

In these last few questions, we've seen how the equation y=mx+by=mx+b relates to the graph of a line and particularly how the parameter mm describes its slope.

In the course ahead, we'll further investigate this equation and others, developing a deeper intuition about how changing one part of an equation affects the shape of its graph.

               
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