What is the y-intercept of the line shown below? Enter your answer as a
coordinate pair.

(0, 1 ) or y=1.

Step-by-step explanation:

The y-intercept is shown by where the line intersects the y-axis.

As you can see in the graph displayed, the line intersects the y-axis at y= 1, or (0, 1).

b. an equilateral triangle inscribed in a circle

step-by-step explanation:

we are given the figure of two circles having a triangle inside.

now, we know that,

"when a figure is lying inside an another figure, then the outside figure is known as circumscribed figure and the figure lying inside is referred to as the inscribed figure".

as we see that, the circles are containing the triangle completely.

thus, the circles are the circumscribed figures and the triangle is the inscribed figure.

hence, we get, 'an equilateral triangle is inscribed in a circle'.