Question

In each of the following equations, what is y when z=2? When x = 0? Where would the graph of each equation cross the y-axis? Homey

Help
a. y = 3x + 15
b. y=3-3z

Answer 1

a. y = 3 × 0 + 15

y= 0+15

y= 15

Explanation:

Subtitute the variables into the place they are denoted with and solve it

And the place where the equation will cross the y axis is just the last numbers i.e. 15 and 3z which is 6