Question

Which is the following functions are linear?

Answer 1

Answer is function B.

Step by step.
Linear means a straight line.

In function A, the ratios / slope is not the same. The points will be scattered on a graph. It will not be a straight line.

In function B, the ratio /slope is the same, so the points on the graph will form a straight line.

See attachment for how I found slope.
(y2-y1) over (x2-x1). I simply subtracted pairs on the chart.

Answer 2

B) Function B

Explanation:

The first one is obviously EXPONENTIAL ...for each 'x' , y = x^2

the second one is y = 8/5 x a line with slope 8/5 <=====linear