PRACTICE 4.5 Graph Using Slope- Intercept Form
Name: __________________________
Identify the slope and y-intercept. Then graph the line.
1.
y = 2x – 4
2.
y= x+1
m = ____ b = _____
m = ____
4.
5.
y=x–1
m = ____
7.
b = _____
y = 3x – 4
m = ____ b = _____
y = –2x + 3
m = ____
8.
b = _____
b = _____
y= x–2
m = ____
b = _____
3.
y = 3x
m = ____
6.
b = _____
y= x+3
m = ____
b = _____
9.
x+3
y=–
m = ____
b = _____
Tell whether the graphs of the two equations are parallel lines. Explain your reasoning.
10.
y = 8x –3, 8x + y = 3
______________________
11. 8x + 3y = 9, 3y –4 = 8x
12. y =5x + 2, y =6 – 5x
______________________
____________________
Graph y = mx + b
13.
y = –x – 1
14. y = x – 2
15.
y=4
16.
y = 2x
17.
y=–
x+2
18.
y=– x
19.
x = –2
20.
y=–
x+1
21.
y=
x
22. A family of squirrels takes up residence in the roof of your house. You call a company to get rid of the squirrels.
The company traps the squirrels and then releases them in a wooded area. The company charges $30 to drop off the
traps and then charges $15 for each squirrel it traps. The total cost C (in dollars) is given by the equation C = 30 + 15s
where s is the number of squirrels that are taken away.
a. Graph the equation.
b. Suppose the company raises its fee to $18 to take away each squirrel so that the
total cost for s squirrels is given by the equation C = 30 + 18s. Graph the equation in
the same coordinate plane as the equation in part (a).
c.
How much more does it cost for the company to trap 4 squirrels after the fee is
raised?