exam Maths Puzzle Numerical Ability

Please help with this question. It is not froma book but a test review.

From past experience, a teacher believes that the average score on a geometry exam is 75. A sample of 2

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exam Other Question

describe the resulting graphs by identifying the vertex point, the graphs direction and any axis intercepts gleaned from the table or graphs

y = 2x^2 how i can graph 5x+2y+6=0
i rewrite the equation to y=-5/2x-3
the y intercpet is -3
the slope is-5/2
the x intersept is -6/5