Given the point (4,5) and the slope of 6, find y when x=24.

Question

janu16 · Answer

do you know what formula to use @DanJS

danjs · Answer

yes, do you recall 

y = mx+ b            slope = m

janu16 · Answer

ya

danjs · Answer

they give you a point (4 , 5),  x=4 and y=4   put those in also

danjs · Answer

y=5 *

danjs · Answer

what is b, the y-intercept value

janu16 · Answer

5

danjs · Answer

y = mx+b

5 = 6*4  + b

janu16 · Answer

so isnt y and b the same thing?

danjs · Answer

|dw:1437447373574:dw|

danjs · Answer

the y-axis  intercept

danjs · Answer

so the line is y = m*x + b

you given m=6  , x = 4, y = 5

only thing left is find b

danjs · Answer

5 = 6*4 + b

5 = 24 + b 

b= 5 - 24

b = -19

danjs · Answer

so now with the slope m=6 and y-int b = -19

you can write the general equation for the line... y = mx+b


y = 6x - 19

janu16 · Answer

so so that would be the equation  y = 6x - 19

danjs · Answer

yes, now you can answer the question

janu16 · Answer

118
 144
 125
 149
these are the answer choices so i plug them n or soething?

danjs · Answer

put in 24 for x

janu16 · Answer

y=6+24-19

janu16 · Answer

nvbm

janu16 · Answer

so it would be 6 times 24 than -19?

danjs · Answer

yes

janu16 · Answer

omg thanks i finally got it. so like there was a question where they gave you a point and you have to tell which graph the point belongs to. i have never learned tht and its weird

danjs · Answer

ok open a new thread , this is long

janu16 · Answer

ok

danjs · Answer

i got time for one more at the moment