2.2 Quiz Review

If the table represented a tile pattern, what would it be growing by?

• 1

• 4

• -1

• -4

Answer explanation

Your number of tiles (y) decreases b 4 tiles every 1 figure (x).

How many tiles would the tile pattern start with?

• -3

• 5

• 1

• -7

Answer explanation

The tile pattern starts with figure 0 (when x=0). The number of tiles (y) is -3 for figure 0.

What would the equation be for this tile pattern?

• y=4x-3

• y=-4x+5

• y=-4x-3

• y=4x+5

Answer explanation

The number of tiles are decreasing 4 tiles every one figure (growth) and it starts with -3 tiles in figure 0.

• 5

• -2

• 2

• -5

Answer explanation

The slope (growth) is in front of the x in the equation.

• 2

• -2

• 5

• -5

Answer explanation

The y-intercept is the starting point on the y-axis for figure 0 (when x=0) It is the b-value being added in the equation.

Answer explanation

When x=0, y=-5 because it starts with -5.

When x=1, y=-3 because it grows by 2 every figure.

When x=2, y=-1.

When x=3, y=1.

When x=4, y=3.

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• 
• 

Answer explanation

-1/1 is the change in y/change in x, so the growth goes down 1 every time you move one point to the right. The starting value was 2 on the y-axis.

Sketch the graph y=3x-2

Answer explanation

Your graph should start down at -2 on the y-axis and then each point should go up 3 and to the right 1 from the point before it.

Identify the coordinate (x,y) of the y-intercept.

Answer explanation

The y-intercept is where it crosses the y-axis.

Fill in the blanks: The y-intercept represents the _________ ________.

(starting/ending) (height/year)

Answer explanation

Because it is on the y-axis it is the starting height. From that moment on, the height increases.