Unit 3 - Slope, Y-intercept, Proportional, and Functions

Does this graph represent a proportional function?

• Yes, because it is decreasing.

• No, because it is decreasing.

• Yes, because the y-intercept is 1.

• No, because it does not go through the origin.

Does this mapping represent a function?

• No, because the arrows cross each other.

• No, because the 10 has 2 arrows pointing to it.

• Yes, because each x value only goes to one y value.

• Yes, because the arrows cross each other.

Does this table represent a function?

• Yes, because there are no repeating y values.

• No, because there is a repeating x value.

• Yes, because the y-intercept is 2.

• No, because there is a negative x value.

What is the slope of the line?

• Slope = 2

• Slope = 3

• Slope = -1.5

• Slope = 1/2

What is the y-intercept of the line?

• -1.5

• 3

• 1/2

• 2

Which equation matches the following?

A farmer is harvesting 30 pumpkins every 3 days. When he began harvesting, he already had 9 pumpkins.

• y = 30x + 3

• y = 3x + 9

• y = 10x + 9

• y = 30x + 9