Unit 2 (Linear Equations)

Question 1

What is the formula for rate of change?

Answer 1

Change in OUTPUT/Change in INPUT

Question 2

What are the 4 types of slope?

Answer 2

Positive, Negative, Zero, Undefined

Question 3

What is the slope formula?

Answer 3

y2 - y1/x2 - x1

Question 4

The equation for zero slope is–

Answer 4

y = x
x = y-coordinate where line is on

Question 5

The equation for undefined slope is–

Answer 5

x = y
y = x-coordinate where line is on

Question 6

Intercept form of an equation is y = a + bx.

What does the “a” mean?

Answer 6

Starting Value/y-intercept

Question 7

Intercept form of an equation is y = a + bx.

What does the “b” mean?

Answer 7

Rule/Slope/Rate of Change

Question 8

Intercept form of an equation is y = a + bx.

What does the “x” mean?

Answer 8

Independent Variable

Question 9

Find the slope of (7,3) and (8,4) with (7,3) being x1 and y1 and (8,4) being x2 and y2.
Remember: y2 - y1/x2-x1

Answer 9

1

Question 10

TRUE/FALSE

The coordinates in slope can be swapped around as long as they stay together.

Answer 10

True

Question 11

What are the 2 general questions to ask when drawing a line of fit?

Answer 11

1) Does your line of fit show the general direction of the scatterplot?
2) Does your line have about the same number of points on either side?

Question 12

Positive correlation is when–

Answer 12

The slope of the line is positive

Question 13

Negative correlation is when–

Answer 13

The slope of the line is negative

Question 14

No correlation is when–

Answer 14

The points are too spread out/no general direction

Question 15

TRUE/FALSE
To write an equation for a line of fit, use intercept form.
y = a + bx

Answer 15

True

Question 16

The y-intercept is when–

Answer 16

What y= when x=0