What is the slope of the line that passes through (2,-3) and (9,-7)? Fractions must be in simplest form

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

Haruka hiked several kilometers in the morning. she hiked only 66 kilometers in the afternoon, which was 25% less than she had hiked in the morning. how many kilometers did haruka hike in all?

The table represents a function f(x). what is f(3)? a.-9 b.-1 c.1 d.9