A student raises her grade from a 75 to a 90 what is the percent of increas in the students grade average
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We are given the quadratic:
, with a=1, b=-8, c=15.
We know that the x-coordinate of the vertex, which is the point where the line of symmetry passes through is
.
Thus, the x-coordinate of the vertex is
.
Thus, the line of symmetry is x=4.
Answer: <span>B. The line of symmetry should have been 4 instead of –4. </span>
We know that the x-coordinate of the vertex, which is the point where the line of symmetry passes through is
Thus, the x-coordinate of the vertex is
Thus, the line of symmetry is x=4.
Answer: <span>B. The line of symmetry should have been 4 instead of –4. </span>