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what is the y-intercept?
i dont know
how to find it
what value on the y-axis is it when the line crosses ?
y intercept is -2?
what is the slope (gradient) of the line?; how many units up does the line go, when it goes across 1 unit?
The equation for a line function is y = mx+b you have found b=-2, and m=0
0x + -2
yes, now simplify...
simplify? sry im not good at math...
0x = 0, right?
what happened to the -2?
the -2 is all we have left y = 0x - 2 y = 0 - 2 y = -2
oh okay so d
cool. could you help with a few more? :)
again we have y = mx + b where b is the y-intercept and m is the slope what is b and m in this case?
m= -3 b= -1
correct!, so what is the equation of the line?
is it d?
the slope m is equal to the rise divided run between two points: (x_1, y_1) & (x_2, y_2) m = ( y_2 - y_1 ) / ( x_2 - x_1 )
can you find the slope between (4, 5) & (-3, -1)?
which two options could be correct?
oh i see lol b and c
yeah, but lets check that they are equivalent, can you rearrange B. y-5 = (6/7)(x-4) into y= mx+b form?
we are hoping that the y-intercept will be the same for both B. & C.
im not sure
y-5 = (6/7)(x-4) y = (6/7)(x-4) + 5 = (6/7)x - 4*(6/7) + 5 = (6/7)x - 4*(6/7) + 5*(7/7) = (6/7)x + (-4*6 + 5*7) / 7 =
i have to go, thx for the help lol :)