Question

Write an equation for the line in point-slope and slope-intercept forms.
4) Passes through (1, 2) and has a slope of 7.
Plz help can someone plz show me how to do this??????!!!!!!

Answer 1

\[m=\frac{ y-y _{1} }{ x-x _{1} }\]

Answer 2

use this formula

Answer 3

in which m is the slope and the values of \[x_{1}\] and \[y_{1}\] come from the x and y
values of the point you were given.

Answer 4

Can u Substitute those values

Answer 5

wait substitute them how?

Answer 6

plug in to the equations

Answer 7

but I only have one x and y

Answer 8

m is 7
x is 1
y is 2

Answer 9

ok so can my other point be (2,18)?

Answer 10

now plug in these numbers to the formula i showed u above

Answer 11

Another way you can do it is to use the slope-intercept form of an equation.

Answer 12

y=mx+b

Answer 13

ok so what's my answer?

Answer 14

y=mx+b
where m is the slope of the line
b is the value where the graph crosses the y axis.
we already know that 7 is our slope
so

y=7x+b

Answer 15

Substitute x = -1 and y = -2 values into the slope intercept form.

Answer 16

can u do this?

Answer 17

i will do it for u
2=7*1+b

Answer 18

understood?

Answer 19

so my equation for the line in point slope, and slope intercept forms that passes through (1,2) and has a slope of 7 is 2=7*1+b?

Answer 20

correct