use y=mx=b (m being slope and b being y-intercept)
so y=8x+5 and your first coordinate would be (0,5) because if x was 0,
plug it in, [y=8(0)+5] and when simplified y=5 and if x=0 and y=5 well go figure
and for your next coordinates, for ex: x=1 then plug x in [y=8(1)+5] and when
simplified, y=8+5 which in turn equals y=13 so (1,13)
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8x plus 4y equals 5 is 8x + 4y = 5.
Same way you graph y = -4x - 0.5
x2+8x = -3x2+5 4x2+8x-5 = 0 (2x+5)(2x-1) = 0 x = -5/2 or x = 1/2
x2 + 8x + 15 = (x + 3) (x + 5).
8x+5=4x+13 4x=8 x=2 Therefore, your answer is 2.