Construct Functions to Model Linear Relationships

• Station 1

• Station 2

• Station 3

Tags

CCSS.8.EE.B.5

• 2066

• 2000

• 2064

Tags

CCSS.8.EE.B.5

• y=21x+5

• y=21x+7

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

A car driving by crosses the start line at t = 0. . After 9 seconds, the car has traveled 1, 062 ft. Write a linear function rule to model the distance in feet, y, to the number of seconds the car has traveled, x, after crossing the "start" line

• y = 118x

• 1062 = m • 9

• x = 118y

• y = 118x + 0

Tags

CCSS.HSF-BF.A.1A

A line passes through the points (4, 20) and (6, 22). Write a linear function rule in terms of x and y for this line. The linear function rule is:

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

Find a function rule for the line that passes through the origin​ (0,0) and the point ​(−7​,−14​). What is the function rule for the​ line?

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2

How can you write the equation for a linear function if you know only two ordered pairs for the function?

• Use the two ordered pairs to find the slope (m). Then substitute the slope and one set of ordered pairs into y=mx+b to solve for b.

• Use the two ordered pairs to find the y-intercept (b). Then substitute the y-intercept and one set of ordered pairs into y=mx+b to solve for m.

• Use the two ordered pairs to find the value of y. Then substitute the the value of y and one set of ordered pairs into y=mx+b to solve for x.

• Use the two ordered pairs to find the value of x. Then substitute the the value of x and one set of ordered pairs into y=mx+b to solve for y.

The deli charges $7.50 for a salad weighing 3 pounds. A salad weighing 4 pounds costs $9.00. What equation can be used to represent the cost of the salad (y) , for the (x) pounds of salad?

• y = 1.5x + 3

• y = -1.5x + 3

• y = 1.5x - 3

• y = -1.5x - 3

What does "m" represent in y=mx+b?

• y-intercept

• slope

• macaroni

• nothing

Tags

CCSS.8.EE.B.6

CCSS.8.F.A.3

A line passes through the points (5, –7.5) and has a y-intercept 10. Which is a linear function in the form of y = mx + b for this line?

• y = 0.5x + 10

• y = –1.5x + 10

• y = –3.5x + 10

• y = 10x – 3.5

Tags

CCSS.8.F.B.4

CCSS.HSF.LE.A.2