Question

What is the equation of the line that passes through the points (-2, 1) and (1, 10)?

3x - y = -7

3x - y = -5

3x - y = 5

x + 3y = -5

Answer 1

do you know how to do point slope?

Answer 2

A little. If I am given an equation I can solve it but I am not sure what they are asking in this.

Answer 3

use the equation y=mx+b
m=slope
b=y-intercept

Answer 4

y - 10 = 3x (x - 1)

Answer 5

if you use the quation m= y2-y1 over x2-x1 you will get the slope

Answer 6

does this formula seem familiar to u y=mx+b?

Answer 7

@MiaS

Answer 8

I know y = mx + b but not @melody16 s

Answer 9

Can you plug in the numbers for me?
(-2, 1) and (1, 10)

Answer 10

Do you know how to do that?

Answer 11

To find the equation we have : (-2, 1) and (1, 10)?
\[y=mx+b\]
where m is the slope. We can calculate m by :
\[m=\frac{y_2-y_1}{x_2-x_1}=\frac{10-1}{1-(-2)}=3\]
To find : b
since (1,10) is from the line then :
\[10=3\times 1+b\Rightarrow b=10-3=7\]
So :
\[y=3x+7\]

Answer 12

What numbers do I plug in?
Do I find slope on graph paper first to get y intercept?

Answer 13

or you could pick a coordinate and plug in the x and y in the slope intercept form to get b

Answer 14

@Noura11 did everything

Answer 15

Is my answer A

Answer 16

and what does V ∩ (~H ∩ ~ M) mean. I do not recognize it but it is a question

Answer 17

What is your last equation exactly ?

Answer 18

Also. is y = mx + b slope intercept form

Answer 19

Campbell Music Academy held workshops on classical music composers Mozart, Vivaldi, and Haydn. The Venn diagram shows the number of seniors who chose to attend workshops on each of the three composers.


If the total number of seniors in the academy is 64, what is the total number of students who belong to the set V ∩ (~H ∩ ~ M)?

45

33

19

15

Answer 20

well, b is the y-intercept

m is the slope

y = mx + b has both of these in it

hence, it is slope-intercept form ;)

Answer 21

Thanks, @funinabox

Answer 22

y=mx+b slope intercept
ax+bx = c standard form
y-y1 = m (x-x1) point slope form

Answer 23

So what Is it that they are asking. I do not understand it with three numbers.
Do I need whatever is not in h or m and only v

Answer 24

You want anything that is NOT in H, NOT in M, but IS in V.

Answer 25

so 15

Answer 26

Good job!

Answer 27

Thanks