**Math 116, Week 4 Checkpoint, Graphing Equations**

(If you have access to MyMathLab it makes questions easier to view.) Please show graphs.

Graph the equation and identify the y-intercept.

y = ½ x

Graph the equation and identify the y-intercept.

y = 5x – 5

Graph the equation and identify the y-intercept.

y + x = -5

Graph the equation and identify the y-intercept.

x + 2y = 8

The value, v, of a shopkeeper’s inventory software program is given by v = -1/2t + 4, where t is the number of years since the shopkeeper bought the program. What is the program worth 9 years after it is first purchased?

Plot the point with the given t-value, 4.

Find the y-intercept and x-intercept for the equation.

4x + 3y = 48

(Type an ordered pair.)

Use the intercepts to graph the equation.

x + 2y = 4

Find the intercepts and then use them to graph the equation.

5y – 15 = 5x

Find the intercepts and then use them to graph the equation.

y = -5 – 5x

Graph the equation.

y = 6

Graph the equation by plotting points.

21 – 3y = 0

Graph the line containing the given pair of points and find the slope. (7,0) and (2, -2)

Find the slope, if it exists, of the line containing the points (-2, ½) and (-6, ½).

m =

(Simplify your answer. Type as integer or fraction. Type N if the slope is undefined.)

A roof raises 1.2 feet vertically and 12.9 feet horizontally. What is the grade of the roof?

The grade of the roof is %.

Find the slope, if it exists.

y = -5x + 8

m =

(Simplify your answer. Type as integer or fraction. Type N if slope is undefined.)

Find the slope, if it exists.

3x – y = 7

m =

(Simplify your answer. Type as integer or fraction. Type N if slope is undefined.)

Find the slope, if it exists.

y = -2.17x

m =

(Simplify your answer. Type an integer or a decimal. Type N if the slope is undefined.)

Find the slope, if it exists.

2x – 4y + 17 = 0

m =

(Simplify your answer. Type an integer or a fraction. Type N if the slope is undefined.)

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