Find the equation of a line that passes through the point (0,1) and has a gradient of 2. Leave your answer in the form
y=mx+c

Samantha swam upstream for some distance in one hour. she then swam downstream the same river for the same distance in only 12 minutes. if the river flows at 4 mph, how fast can samantha swim in still water?

Which of the functions graphed below has a removable discontinuity?

What is the circumference of a circle with an area of 50.24 cm²?