Help (04.01)

If y = 5x − 4, which of the following sets represents possible inputs and outputs of the function, represented as ordered pairs? (4 points)

Group of answer choices

{(0, −4), (2, 6), (4, 20)}

{(0, −4), (2, 6), (4, 16)}

{(0, 4), (2, 6), (4, 16)}

{(0, 4), (2, −6), (4, 20)}

B

Step-by-step explanation:

use the rule to figure it out.

y=5x-4

plug it in, starting with the first x input

5x turns into 5*0

5*0=0

0-4=-4

that narrows it down to 2 choices (A and B) with the first x input as -4

then continue

5x turns into 5*2

5*2=10

10-4=6

still working

last, 5x turns into 5*4

5*4=20

20-4=16

there is only one choice left that has the x values, -4 and 16

the answer is B. it's really not hard at all, you just plug it in. easy stuff. you got this!

(0,-3) see attached graph

step-by-step explanation:

a. to solve the system, graph the two equations.

x = y+3 becomes y=x-3 has m=1/1 and b=-3. start at (0,-3) on the y-axis and plot a point. then move up 1 unit and 1 unit to the right. plot a point and connect.

y=-4x+3 has m =-4/1 and b=-3. start at (0,-3) on the y-axis and plot a point. then move down four units and to the right 1 unit. plot a point and connect.

the solution is the point (x,y) where the two lines intersect. by the graph below it is (0,-3).

b. to solve by substitution, substitute y = -4x-3 into x= y+3

x= (-4x-3) +3

x=-4x

5x=0

x=0

now substitute x = 0 back in to find y.

y= -4(0)-3

y=0-3

y=-3

solution is (0,-3)

c. use elimination by adding the equations together.

x-y=3

4x+y=-3

5x=0

x=0

then substitute into one equation to find y.

y=-4(0)-3

y=-3

answer: 177/8

step-by-step explanation: