Explanation:
The y intercept is when x=0 what is the y value.
When x=0, the y intercept is 1.
b. A gradient is the slope of the line. We need to find the rise and run of the line between two points.
Let use points 0,1 and 1,3
Our y values rise by 2 values and our x values change by 1 value so our slope is
![(2)/(1) = 2](https://img.qammunity.org/2022/formulas/mathematics/high-school/dbxl2vx7modk35232qavl5d3a6mrqmhkqt.png)