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 one year ago
What is the y−coordinate of the y−intercept of the line that passes through the points (−4, −4) and (4, 8)?
The only question im stuck on PLEASE HELP! :)
 one year ago
What is the y−coordinate of the y−intercept of the line that passes through the points (−4, −4) and (4, 8)? The only question im stuck on PLEASE HELP! :)

This Question is Closed

precal
 one year ago
Best ResponseYou've already chosen the best response.0figure out the slope then use y=mx+b and sub the slope for m and use one of the points for (x,y) to solve for b. b is our answer

ErinWeeks
 one year ago
Best ResponseYou've already chosen the best response.0Is there anyway you could start the equation of for me?

precal
 one year ago
Best ResponseYou've already chosen the best response.0dw:1358369271960:dwtell me what the slope is first

ErinWeeks
 one year ago
Best ResponseYou've already chosen the best response.0the slope would be M right but where am I looking for the slope for with the fraction?

precal
 one year ago
Best ResponseYou've already chosen the best response.0you need the slope to be able to use it in y=mx+b then you can use one of the points I would use (4,8) x=4 y=8 then you are solving for b. b is known as your y intercept and that is what you are looking for

ErinWeeks
 one year ago
Best ResponseYou've already chosen the best response.0So I have so far y= ? + 8 Would I plug in the 4?

precal
 one year ago
Best ResponseYou've already chosen the best response.0dw:1358370299889:dwyou need the slope to sub the m value and solve for b

ErinWeeks
 one year ago
Best ResponseYou've already chosen the best response.0Alright so what operation would I do from here?

Carolin
 one year ago
Best ResponseYou've already chosen the best response.1next, u can just substitute the M = gradient = slope into this equations to find value b

Carolin
 one year ago
Best ResponseYou've already chosen the best response.1then, rewrite the equation form in y = mx + b

ErinWeeks
 one year ago
Best ResponseYou've already chosen the best response.0Whats the value for m?

ErinWeeks
 one year ago
Best ResponseYou've already chosen the best response.0im so confused on what to do I might just guess lbvs...

Carolin
 one year ago
Best ResponseYou've already chosen the best response.1y = mx + b 8 = (3/2)(4) + b 8 = 6 + b b = 8 6 = 2 then, rewrite the equation: y = mx + b y = 3/2 x + 2 That the final answer

ErinWeeks
 one year ago
Best ResponseYou've already chosen the best response.0Oh you times by 4 DURR! Thank you so much I really appreciate it that makes so much more sense! Thank you again :)

ErinWeeks
 one year ago
Best ResponseYou've already chosen the best response.0so y=3/2x+2 is my answer?
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