Equations as Linear Functions

What is the slope of the line?

• Positive

• Negative

• Zero

• Undefined

What is a y-intercept?

• The value of y when x is zero

• The value of x when y is zero

• Slope

• where a line intersects the x-axis

Is the function represented by the table linear or nonlinear?

• linear

• nonlinear

• Linear

• Nonlinear

Which of the statements about the graph below is true?

• The graph is proportional and has an equation of y = -x +18.

• The graph is non-proportional and has an equation of y = -x + 18.

• The graph is non-proportional and has an equation of y = -2x + 18.

• None of the above statements are true.

The table below shows the amount that a catering company charges based on the number of people at an event. Which of the following equations shows the relationship between c, the amount the company charges based on p, the number of people at the event?

• c = 16p

• c = 75p + 13

• p = 13c + 75

• c + 13p + 75

Zane owes his dad money for his cell phone that he lost. So far, Zane has paid his dad $23, and he will pay his dad an additional $45 each month until he had repaid him for the phone. Which equation shows the relationship between m, the number of months that Zane has been making payments and t, the total amount he has paid his dad?

• t = 45m + 23

• m = 45t + 23

• t = 23m + 45

• t = 68m

Preston needs to write an equation in slope-intercept form to represent the relationship between x and y in the table below. What will be the value of the y-intercept in this equation?

• 12

• -6

• -12

• -15

Find the slope and the y-intercept of the linear function shown below.

• Slope: 5/2,

  y-intercept: -10

• Slope: 1/2,

  y-intercept: -10

• Slope: 1/4,

  y-intercept: 1

• Slope: -5/2,

  y-intercept: -10

y = 4 + 2x

• Linear

• Exponential

• Neither

• All of the above