Question

which solution equals f(x)=5/2x-1?

Answer 1

if you find and apply the slope (aka the mx value or rise over run fraction) you will move up from an intercept on the graph by whatever number takes place over the numerator and across by the number of the denominator. in this case, the slope is 5/2 and the y-intercept is -1. so start by putting a dot at -1 (0, -1 since it's the intercept) and move up 5 units and to the right 2 units. plot where you end up afterwards and then connect the dots with a straight-edge. the line will be diagonal.

Answer 2

so the 1st one?

Answer 3

the straight line?? no not at all, apply what i just said

Answer 4

I don't understand

Answer 5

let me try to help you visualize

Answer 6

so if it's not the first one then the second and ok?

Answer 7

start at (0,-1), that's the intercept. put a dot.

Answer 8

Joe, you forgot to type in X for the first problem that's why the line is straight

Answer 9

It should be 5/2x not just 5/2

Answer 10

That's....that's just an answer choice

Answer 11

I explained what he did wrong from those 2 answer choices

Answer 12

So therefore, the 2nd answer would be the most reasonable
Or he could just use desmos.com proving as a accurate site to answer this problem

Answer 13

or he could actually work it out, you know. like i explained

Answer 14

i literally said it's going to be diagonal

Answer 15

Okay, I understand... I was just trying to explain what went wrong from my point of view

Answer 16

But if you feel if I'm interfering I will stop trying to help while you can

Answer 17

this is the graph of \[f(x)=\frac{ 5 }{ 2x-1 }\]

Answer 18

Joe, the first image is a horizontal line, meaning we would have a slope of 0. The equation of this line would be something like "y=3"

Now for the equation, we have a y-intercept of -1, meaning we must go to the point (0,-1) and plot a point on our graph.
Then from there, we go up 5 on the y-axis, meaning we get to (0,1.5). Then we go over 2 spaces on the x-axis to the point (1,1.5)

So, image 2 is indeed the graph that represents the function.

Answer 19

Okay thank you, I understand what you mean

Answer 20

So like the first one would should be y=3 or y=1

Answer 21

so like whenever a line is like that it is always y=1 no X?

Answer 22

oh that was just an example of what a line with an undefined slope is. For your specific graph, it's always y=#
in your case y=1.5. do you see how i got the 1.5?
because the graph is increasing by 0.5 each time.

Answer 23

No?

Answer 24

wait that 5/2?

Answer 25

like the sope? slope*

Answer 26

the slope is 5/2, yes.
But the interval in which your graph increases is 0.5.
Each line represents 0.5 like such


each line represents 0.5

Answer 27

OH OKAY, thank you maddi

Answer 28

@mxddi3