Functions and Equations Assessment

In this video, Mr. Boskin covers various math topics for grade eight, including analyzing temperature data, understanding proportional relationships, graphing linear equations, and solving systems of equations. The lesson begins with an introduction to the practice problems, followed by a detailed analysis of temperature data to determine if it represents a function. The video then explores proportional relationships through equations, graphing linear equations, and concludes with solving systems of equations using substitution.

What was the high temperature on day 7 according to the data?

• 61 degrees

• 63 degrees

• 60 degrees

• 62 degrees

On which days was the high temperature recorded as 61 degrees?

• Day 2, 4, 6

• Day 4, 6, 8

• Day 3, 5, 7

• Day 1, 3, 5

Is the high temperature a function of the day?

• Yes, because temperatures are always increasing

• No, because temperatures can repeat

• Yes, because each day has a unique temperature

• No, because days can have multiple temperatures

Why is the day not a function of the high temperature?

• Because days are not unique

• Because temperatures are always the same

• Because each temperature corresponds to multiple days

• Because temperatures are not recorded

What is the unit rate or slope in the equation describing Lynn's sister's earnings?

• 11.0

• 9.6

• 10.2

• 8.5

How would you express x as a function of y in the earnings equation?

• x = y * 9.6

• x = y + 9.6

• x = y - 9.6

• x = y / 9.6

What is the dependent variable in the equation 2m + 4s = 16?

• 4s

• 2m

• s

• m

If m is 0, what is the value of s in the equation 2m + 4s = 16?

• 0

• 2

• 8

• 4

What is the solution for x in the system of equations given in the video?

• x = -3

• x = -4

• x = -2

• x = -1

What is the y-value when x is -3 in the system of equations?

• -9

• -12

• -10

• -11