Algebra 1 STAAR Linear Functions

A line contains the points (-2, -2) and (4, 2). What is the slope of the line?

• -2/3

• 3/2

• 2/3

• -3/2

The graph of a line passes through the points (-3, 1) and (5, 8).

What is the slope of the line?

• 9/2

• 7/8

• -9/2

• -7/8

What is the slope of the graph of y = 12x - 19?

• -19

• 12

The water level in a tank is changing at a constant rate. The graph shows the relationship between time in hours, x, and the water level in meters, y.

The water level ____________ at a rate of _____________ m/h.

• The water level _decreases_ at a rate of _0.25_ m/h.

• The water level __decreases__ at a rate of __1_ m/h.

• The water level _decreases_ at a rate of __4__ m/h.

• The water level _increases_ at a rate of _0.25_ m/h.

• The water level _increases_ at a rate of _1_ m/h.

Rate of change?

The table shows the linear relationship between the average height in feet of trees on a tree farm and the number of years since the trees were planted.

What is the rate of change of the average height in feet of the trees on the farm with respect to the number of years since the trees were planted?

(hint: slope = y/x)

• 14 ft/yr

• 14 yr/ft

• 7 ft/yr

• 7 yr/ft

The graph of a linear function, f, is shown.

What is the zero of f?

• -3

• 3

• 2

• • - 6

The graph of a linear function is shown on the grid.

What are the x-intercept and the y-intercept of the line?

• x-intercept: (8, 0)

  y-intercept: (0, -2)

• x-intercept: (-2, 0)

  y-intercept: (0, 4)

• x-intercept: (-2, 0)

  y-intercept: (0, 8)

• x-intercept: (4, 0)

  y-intercept: (0, 8)

The graph of linear function f passes through the point (1, -9) and has a slope of -3.

What is the zero of f?

The graph of linear function k passes through the points (-7, 0) and (1, 8).

Which statement must be true?

• The graph of k passes through the point (-1, -8).

• The zero of k is 7.

• The x-intercept of the graph of k is -7.