Finding Slope of a Line

If m = 8/5 and b = -8/5, what is the equation of the trend line in y= mx + b?

• 0 = 8/5 (1) - 8/5

• y = -8/5 x + 8/5

• y = 8/5 x - 8/5

• y = mx + b

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

What ordered pairs would you use to find the slope for the trend line?

• (9,0) (3,8)

• (0,9) (8,3)

Find the slope between (0,9) and (8,3)

• m = 6/8

• m = -3/4

• m = 3/4

Tags

CCSS.8.EE.B.5

If m = -3/4 and b = 9, what is the equation of the trend line in y= mx + b?

• 0 = -3/4 (9) +9

• y = -3/4 x + 9

• y = -3/4 x - 9

• y = 3/4 + 9

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

If you selected point (1,0) and m = 8/5, what substitution is correct to solve for b?

• 1 = 8/5 (0) + b

• 0 = 8/5 (1) + b

• 8/5 = 1 (0) + b

• y = mx + b

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

The rate of change of a linear relation is:

• the slope

• the y-intercept

• the equation of a line

• none of the above

• all of the above

Tags

CCSS.8.EE.B.5

This linear relation has

• a y-intercept of +2

• a positive slope

• a negative slope

• no y-intercept

The "Positive Slope" property states that:

• the line goes down

• two lines have the same slope

• the line goes up

• the line is steeper

Tags

CCSS.8.EE.B.5

The "Parallel Lines" property states that:

• the line goes down

• two lines have the same slope

• the line goes up

• the line is steeper

Tags

CCSS.8.EE.B.6

Slope is calculated by

• finding the point where the line crosses the y-axis

• finding the point where the line crosses the x-axis

Tags

CCSS.8.EE.B.5