Copy and complete the table for y=3x2−5x−7
x -3 -2 -1 0 1 2 3 4
y=3x2−5x−7 35 -7 -9 5
(b) Using a scale of 2cm = 1 unit along the x- axis and 2cm = 5 units along the y- axis, draw the graph of y=3x2−5x−7.
(c) On the same axis, draw the graph of y+3x+2=0.
(d) From your graph, find the : (i) range of values of x for which 3x2−5x−7?
Solve number D?
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Asked by Abugu Ejike Emenike on 8th December, 2019
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1 month ago
y=3x2 - 5x - 7
when x=-3
y=3*[-3]^2 - (5*-3) - 7
y=3*9 - (-15) -7
y=27+15-7
y=35
so like that you will do the rest to complete it
when
x=-3 ,y=35
x=-2,y=15
x=-1,y=1
x=0,y=-7
x=1,y=-9
x=2,y=-5
x=3,y=5
x=4,y=21
range(r)=highest(h) - lowest(l)
r=35-(-9)
r=35+9
r=44