Which is a unit rate?

In the figure below, triangle rpq is similar to triangle rts. what is the distance between p and q? a. 24 b. 42 c.50 d. 54

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?

What is the slope of the line that passes through the points (–9, 2) and (0, 4)? the slope of the line is