exam Maths Puzzle Numerical Ability

How do you find the slope and y intersept on a graph? (this is 8th grade math)

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exam Other Question

Find two quadrants in which there are no points on the graph of y = x^2 + 1.

a. I & II
b. I & III
c. I & IV
d. II & III
e. II & IV
f. III & IV
g. Al of these have points in at least three quadrants. I know that it is possible to add two polynomianls each of degree 3, and have the sum be a polynomial of degree 2, what I need is to see an example of this please. Thank you