Question

What is the equation of the line that passes through the point (2, 5) and has a slope of 2?

A y = 2x + 1
B y = 2x + 3
C y = 2x - 8
D y = 2x - 3

Answer 1

use this formula y-y1 =m(x-x1)
m is slop

Answer 2

or just replace x with 2 into a choice, and calculate y. if you get 5, that equation is your answer

Answer 3

@phi so it would be B?

Answer 4

B y = 2x + 3
replace x with 2
y = 2*2 +3
what do you get for y?

Answer 5

what is 2 times 2, then add 3 ?

Answer 6

sorry so its actually A right? @phi

Answer 7

A y = 2x+1

replace x with 2
y= 2*2+1

I assume you get 4+1 or 5
so (2,5) is on this line.

Answer 8

notice that all the equations have 2x meaning they all have a slope = 2

doing the problem this way does not work if you had 3x (or any number not 2), because then it would have the wrong slope.

Answer 9

@phi so A is not the answer?

Answer 10

If you use maths111 idea, you figure out what the equation is, then look for it.
That is the safest way.

Answer 11

A is correct. why do you think it isn't ?

Answer 12

@phi sorry i meant why isn't A the answer, but I'm glad it is can you help me with another?