E General section 1. Solve each pair of the following a) y = x-2 b x + y = 4

y=×-21), ×+y=411)

subtitute y into equation 11)

x+(×-2)=4

×+×-2=4

2×=4+2

2×=6

divide both sides by 2

x=3

options a,b,c are the right answer.

step-by-step explanation:

a linear parent function is always represented as y = x

if we write this function in the form of y=mx+c

⇒

or  

now if we plot a graph we will find these characteristics:

1) y intercept of the graph is zero so its a straight line passing through origin.

2) as we can see in both the forms of function written, values of x and y may be either positive or negative for the positive slope means points on the graph are either in first quadrant or in third one.

3) it's slope is one.

-2x + 7 = 7

subtract 7 from both sides.

-2x = 0

divide both sides by -2.

x = 0