Linear Functions and Slopes

Write an equation that is parallel to the line
y = x - 5 through (1, -2)

• y = -3x +1

• y = x - 3

• y = x + 1

• y = 3x +1 

Write an equation of a line perpendicular to
y = 2x + 3 through (-2, 4)

• y = -3/2x + 3

• y = 3/2x + 3

• y = -1/2x + 3

• y = 3x - 3/2

which equation produces the line on the graph

• y = x + 3

• y = 3x - 3

• y = -x - 3

• y = -3x + 3

Which function is linear?

• y = 2x + 4

• y = 2x² + 4

• y = 2x(4 − 3x)

• xy = 15

Check the correct answers: In order to be a linear function:

• It's graph must have a straight line

• It must pass a polygraph test

• Each x-value has only one y-value

• A parabola is a Linear Function

Which of these functions are linear?

Select two answers.

• 
• 

Find the rate of change

• 1

• 2

• 11

• Not a constant slope/Non-Linear

Sonia has $40 in her lunch account and pays $2 each day to eat lunch.

• Linear

• Non-linear

Is the function Linear or Nonlinear?

• Linear

• Nonlinear

Which statements below determine when a function is linear? Select two answers

• The function can be represented by an equation of the form y = mx + b.

• The rate of change is always constant.

• The initial value must be at 0

• The graph of the function could be a vertical line.

• The graph can contain curves.