7) The line which passes through 2 points (2,y) and (5.9) has a gradient of 2.
a. Find the value of y
I did this:
2=(9-y)/(5-2)
1/5=y/2
2/10=5y/10
2=5y
y=2/5
but answer at the back of the book is 3.
New Question:
14) The line parallel to y=4x - 5 is:
A. y=2x-5
B. 4x + y + 2 = 0
C. 2y=4x-10
D. 4x-y-1=0
Is there any way to figure this out other than trial and error on a number plane? Or do I just rearrange things in y=4x - 5?
The answer is D.
a. Find the value of y
I did this:
2=(9-y)/(5-2)
1/5=y/2
2/10=5y/10
2=5y
y=2/5
but answer at the back of the book is 3.
New Question:
14) The line parallel to y=4x - 5 is:
A. y=2x-5
B. 4x + y + 2 = 0
C. 2y=4x-10
D. 4x-y-1=0
Is there any way to figure this out other than trial and error on a number plane? Or do I just rearrange things in y=4x - 5?
The answer is D.