Chapter 4
y=3/5 x
If x was -2, what would y be?
In the table on problem 7 on page 192, what is the slope?
Slope is 1.
Solve the system of equations by substitution.
y=-3x-7
y=x+9
(-4,5)
Is the relation in number 2 on page 279 a function?
Yes.
The number y of hours that you study after x days is represented by the equation y=1.5x. How much have you studied after 3 days?
4.5 hours
Use elimination to solve the system of equations.
-x + 5y = 28
x + 3y = 20
(2,6)
y=2x-3
If x = -4 what is y?
-11
y=2x-6
What is the y-intercept?
-6
Solve the system of equations by graphing.
y=-x+4
x+3y=0
(6,-2)
y=x/3 +5
What is y if x is 6?
y=7
y=-4x+8
What is the slope?
-4
Solve the system of equations by graphing.
x-y=-2
2x-3y=-2
(-4,-2)
Is the table a function on page 281 number 11 a linear function?
It is linear.