Connecting proportional relationships and the equation of a straight line

Choose the equation that can be used to find the cost, C, for any number of guests, n.

• C = 2n

• 1n = 20C

• n = 2C

• C = n + 20

Given the table of values for the proportional relationship, what is the equation of the line?

• $y=2x$

• $y=0.5x$

• $y=-\frac{1}{2}x$

• $y=\frac{1}{2}x$

• $y=-2x$

What is the constant of proportionality?

• 4
• 12
• 3
• 1/3

John is traveling to school:

At what segment is John not moving? 

• A

• B

• C

• D

A ____________ vs. ____________ graph shows the distance an object travels in a certain amount of time.

• y-axis, x-axis

• distance, time

• slope, y-intercept

• function, relation

If the traveler continues at the same rate, how far does he/she travel after 5 hours?

• 60 miles

• 240 miles

• 300 miles

• It is not possible to know this.

Which situation below is representative of y-intercept?

• Saving $300 per month

• Starting your day with $30 in your wallet

• Spending $3 per ride at the fair

• Paying $2 for parking every day

Who is running faster?

• Tyler

• Mai

• Diego

• Lin

What is the correct equation for the graph?

• y = x + 5

• x = y

• y = 5x

• x = 5y

y = - 25x

• Proportional

• Non-proportional