Asked by lexie
For each quadratic, state the direction of opening and the y-intercept.
a.y= 3x^2+2x-5
b.y=x^2-7x
c.y=-x^2+12
a.y= 3x^2+2x-5
b.y=x^2-7x
c.y=-x^2+12
Answers
Answered by
R_scott
look at the 2nd order (squared) term coefficient
... positive opens up , negative opens down
x equals zero at the y-intercept ... (0,?)
... plug the zero into the equation to find y
... positive opens up , negative opens down
x equals zero at the y-intercept ... (0,?)
... plug the zero into the equation to find y
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