Given the following linear function sketch the graph of the function and find the domain and range.

Question

ƒ(x) = -3x + 7

Answer 1

Unless the line is vertical or horizontal, the domain and range are both all real numbers.

To sketch the line, pick two values of x, say 0 and 1, find the corresponding values of f(x), and then plot the points and draw the line through them.