Answer:

Step-by-step explanation:
the other 3 are perfect squares and have rational answers.

Answer:
angle is 45° which is constant
Step-by-step explanation:
We use formula for two vectors <u>a </u>and <u>b</u> to calculate angle θ between them by formula
cos θ = <u>a .</u> <u>b</u> / magnitude of <u>a </u> × magnitude of <u>b</u>
<u>Please see the attached file</u>
(-3,4)(0,-3)
slope = (-3 - 4) / (0 - (-3) = -7/3 <=