intercepts of y=2x+3
On the horizontal axis, y = 0: solve 2x + 3 = 0
⇥Let's solve in ℝ: 2x + 3 = 0
⇥ⓘ We subtract 3 from both sides
⇥ 2x = -3
⇥ⓘ Both sides are divided by 2
⇥Solution obtained: x = -32
On the vertical axis, x = 0: calculate f(0)
⇥ 2·0 + 3
⇥ⓘ A product with a zero factor is zero: 2·0 = 0
⇥ 0 + 3
⇥ⓘ Adding 0 changes nothing: 0 + 3 = 3
⇥ 3
▶Axis intercepts:   { (-32, 0), (0, 3) }